3355

1 files changed, 142 insertions, 142 deletions

diff --git a/html/edit/003-shortcuts.mu.html b/html/edit/003-shortcuts.mu.html
index 61a2f538..ce053fd8 100644
--- a/html/edit/003-shortcuts.mu.html
+++ b/html/edit/003-shortcuts.mu.html
@@ -41,9 +41,9 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muScenario">scenario</span> editor-inserts-two-spaces-on-tab [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># just one character in final line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[ab</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[ab</span>
 <span class="Constant">cd]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   assume-console [
     press tab
   ]
@@ -74,8 +74,8 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-handles-backspace-key [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -252,9 +252,9 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muScenario">scenario</span> editor-clears-last-line-on-backspace [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># just one character in final line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[ab</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[ab</span>
 <span class="Constant">cd]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   assume-console [
     left-click <span class="Constant">2</span>, <span class="Constant">0</span>  <span class="Comment"># cursor at only character in final line</span>
     press backspace
@@ -279,9 +279,9 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muScenario">scenario</span> editor-joins-and-wraps-lines-on-backspace [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># initialize editor with two long-ish but non-wrapping lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc def</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc def</span>
 <span class="Constant">ghi jkl]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># position the cursor at the start of the second and hit backspace</span>
@@ -305,8 +305,8 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muScenario">scenario</span> editor-wraps-long-lines-on-backspace [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># initialize editor in part of the screen with a long line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc def ghij]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">8/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc def ghij]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">8/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
   <span class="Comment"># confirm that it wraps</span>
   screen-should-contain [
@@ -338,8 +338,8 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-handles-delete-key [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -427,8 +427,8 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-moves-cursor-right-with-key [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -524,9 +524,9 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># type right-arrow a few times to get to start of second line</span>
@@ -559,9 +559,9 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">1/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">1/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
   assume-console [
     press right-arrow
@@ -584,8 +584,8 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -614,8 +614,8 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># line just barely wrapping</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcde]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcde]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># position cursor at last character before wrap and hit right-arrow</span>
@@ -650,8 +650,8 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-moves-cursor-to-next-wrapped-line-with-right-arrow-3 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">1/left</span>, <span class="Constant">6/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">1/left</span>, <span class="Constant">6/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -679,9 +679,9 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-moves-cursor-to-next-line-with-right-arrow-at-end-of-line [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># move to end of line, press right-arrow, type a character</span>
@@ -710,8 +710,8 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-moves-cursor-left-with-key [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -753,9 +753,9 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># initialize editor with two lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># position cursor at start of second line (so there's no previous newline)</span>
@@ -778,10 +778,10 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># initialize editor with three lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">def</span>
 <span class="Constant">g]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># position cursor further down (so there's a newline before the character at</span>
@@ -806,10 +806,10 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-3 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">def</span>
 <span class="Constant">g]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># position cursor at start of text, press left-arrow, then type a character</span>
@@ -835,10 +835,10 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muScenario">scenario</span> editor-moves-cursor-to-previous-line-with-left-arrow-at-start-of-line-4 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># initialize editor with text containing an empty line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 
 d]
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># position cursor right after empty line</span>
@@ -863,8 +863,8 @@ d]
 <span class="muScenario">scenario</span> editor-moves-across-screen-lines-across-wrap-with-left-arrow [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># initialize editor with a wrapping line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef]</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   screen-should-contain [
@@ -894,9 +894,9 @@ d]
 <span class="muScenario">scenario</span> editor-moves-across-screen-lines-to-wrapping-line-with-left-arrow [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># initialize editor with a wrapping line followed by a second line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef</span>
 <span class="Constant">g]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   screen-should-contain [
@@ -926,9 +926,9 @@ d]
 <span class="muScenario">scenario</span> editor-moves-across-screen-lines-to-non-wrapping-line-with-left-arrow [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># initialize editor with a line on the verge of wrapping, followed by a second line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcd</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcd</span>
 <span class="Constant">e]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   screen-should-contain [
@@ -961,9 +961,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-previous-line-with-up-arrow [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">def]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -1077,9 +1077,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-adjusts-column-at-previous-line [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[ab</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[ab</span>
 <span class="Constant">def]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -1113,9 +1113,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-adjusts-column-at-empty-line [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new [
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new [
 <span class="muRecipe">def</span>]
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -1150,10 +1150,10 @@ d]
 <span class="muScenario">scenario</span> editor-moves-to-previous-line-from-left-margin [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># start out with three lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">def</span>
 <span class="Constant">ghi]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># click on the third line and hit up-arrow, so you end up just after a newline</span>
@@ -1190,9 +1190,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-next-line-with-down-arrow [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">def]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># cursor starts out at (1, 0)</span>
@@ -1295,9 +1295,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-adjusts-column-at-next-line [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">de]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   assume-console [
@@ -1333,9 +1333,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-ctrl-a [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># start on second line, press ctrl-a</span>
@@ -1408,9 +1408,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-ctrl-a-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># start on first line (no newline before), press ctrl-a</span>
@@ -1433,9 +1433,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-home [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># start on second line, press 'home'</span>
   assume-console [
@@ -1457,9 +1457,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-start-of-line-with-home-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># start on first line (no newline before), press 'home'</span>
@@ -1484,9 +1484,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-ctrl-e [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># start on first line, press ctrl-e</span>
@@ -1576,9 +1576,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-ctrl-e-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># start on second line (no newline after), press ctrl-e</span>
@@ -1601,9 +1601,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-end [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># start on first line, press 'end'</span>
@@ -1626,9 +1626,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-moves-to-end-of-line-with-end-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># start on second line (no newline after), press 'end'</span>
@@ -1653,9 +1653,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start on second line, press ctrl-u</span>
   assume-console [
     left-click <span class="Constant">2</span>, <span class="Constant">2</span>
@@ -1716,9 +1716,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start on first line (no newline before), press ctrl-u</span>
   assume-console [
     left-click <span class="Constant">1</span>, <span class="Constant">2</span>
@@ -1739,9 +1739,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-start-of-line-with-ctrl-u-3 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start past end of line, press ctrl-u</span>
   assume-console [
     left-click <span class="Constant">1</span>, <span class="Constant">3</span>
@@ -1762,9 +1762,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-start-of-final-line-with-ctrl-u [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start past end of final line, press ctrl-u</span>
   assume-console [
     left-click <span class="Constant">2</span>, <span class="Constant">3</span>
@@ -1787,9 +1787,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start on first line, press ctrl-k</span>
   assume-console [
     left-click <span class="Constant">1</span>, <span class="Constant">1</span>
@@ -1842,9 +1842,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-2 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start on second line (no newline after), press ctrl-k</span>
   assume-console [
     left-click <span class="Constant">2</span>, <span class="Constant">1</span>
@@ -1865,9 +1865,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-3 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start at end of line</span>
   assume-console [
     left-click <span class="Constant">1</span>, <span class="Constant">2</span>
@@ -1888,9 +1888,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-4 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start past end of line</span>
   assume-console [
     left-click <span class="Constant">1</span>, <span class="Constant">3</span>
@@ -1911,9 +1911,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-5 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start at end of text</span>
   assume-console [
     left-click <span class="Constant">2</span>, <span class="Constant">2</span>
@@ -1934,9 +1934,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-deletes-to-end-of-line-with-ctrl-k-6 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[123</span>
 <span class="Constant">456]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   <span class="Comment"># start past end of text</span>
   assume-console [
     left-click <span class="Constant">2</span>, <span class="Constant">3</span>
@@ -1961,11 +1961,11 @@ d]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with &gt;3 lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .a         .</span>
@@ -2039,11 +2039,11 @@ d]
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span>
   <span class="Comment"># other lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef</span>
 <span class="Constant">g</span>
 <span class="Constant">h</span>
 <span class="Constant">i]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .abcd↩     .</span>
@@ -2071,11 +2071,11 @@ d]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># editor starts with a long line wrapping twice</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdefghij</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdefghij</span>
 <span class="Constant">k</span>
 <span class="Constant">l</span>
 <span class="Constant">m]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   <span class="Comment"># position cursor at last line, then try to move further down</span>
   assume-console [
     left-click <span class="Constant">3</span>, <span class="Constant">0</span>
@@ -2111,10 +2111,10 @@ d]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># editor contains a long line in the third line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">cdef]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   <span class="Comment"># position cursor at end, type a character</span>
   assume-console [
     left-click <span class="Constant">3</span>, <span class="Constant">4</span>
@@ -2141,10 +2141,10 @@ d]
 <span class="muScenario">scenario</span> editor-scrolls-down-on-newline [
   assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># position cursor after last line and type newline</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   assume-console [
     left-click <span class="Constant">3</span>, <span class="Constant">4</span>
     type [
@@ -2172,10 +2172,10 @@ d]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># editor contains a wrapped line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">cdefgh]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   <span class="Comment"># position cursor at end of screen and try to move right</span>
   assume-console [
     left-click <span class="Constant">3</span>, <span class="Constant">3</span>
@@ -2203,11 +2203,11 @@ d]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># editor contains more lines than can fit on screen</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   <span class="Comment"># position cursor at end of screen and try to move right</span>
   assume-console [
     left-click <span class="Constant">3</span>, <span class="Constant">3</span>
@@ -2233,9 +2233,9 @@ d]
 
 <span class="muScenario">scenario</span> editor-scrolls-at-end-on-down-arrow [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abc</span>
 <span class="Constant">de]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
 <span class="Constant">  $clear-trace</span>
   <span class="Comment"># try to move down past end of text</span>
@@ -2300,14 +2300,14 @@ d]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with a few pages of lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d</span>
 <span class="Constant">e</span>
 <span class="Constant">f</span>
 <span class="Constant">g]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   <span class="Comment"># scroll down one page and one line</span>
   assume-console [
     press page-down
@@ -2332,11 +2332,11 @@ d]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with &gt;3 lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .a         .</span>
@@ -2420,11 +2420,11 @@ d]
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span>
   <span class="Comment"># other lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef</span>
 <span class="Constant">g</span>
 <span class="Constant">h</span>
 <span class="Constant">i]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .abcd↩     .</span>
@@ -2464,11 +2464,11 @@ d]
   <span class="Comment"># screen has 1 line for menu + 4 lines</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">5/height</span>
   <span class="Comment"># editor starts with a long line wrapping twice, occupying 3 of the 4 lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdefghij</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdefghij</span>
 <span class="Constant">k</span>
 <span class="Constant">l</span>
 <span class="Constant">m]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   <span class="Comment"># position cursor at top of second page</span>
   assume-console [
     press page-down
@@ -2537,11 +2537,11 @@ d]
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with a long, wrapped line and more than a screen of</span>
   <span class="Comment"># other lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[abcdef</span>
 <span class="Constant">g</span>
 <span class="Constant">h</span>
 <span class="Constant">i]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">6/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">6/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .abcde↩    .</span>
@@ -2581,13 +2581,13 @@ d]
 <span class="muScenario">scenario</span> editor-scrolls-up-past-wrapped-line-using-arrow-keys-4 [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with some lines around an empty line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 
 c
 d
 e]
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">6/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">6/right</span>
   assume-console [
     press page-down
   ]
@@ -2630,12 +2630,12 @@ e]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">5/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># editor contains &gt;3 lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d</span>
 <span class="Constant">e]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">5/right</span>
   <span class="Comment"># position cursor at top of second page</span>
   assume-console [
     press page-down
@@ -2675,11 +2675,11 @@ e]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with &gt;3 lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .a         .</span>
@@ -2723,11 +2723,11 @@ e]
 
 <span class="muScenario">scenario</span> editor-can-scroll [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .a         .</span>
@@ -2810,9 +2810,9 @@ e]
 
 <span class="muScenario">scenario</span> editor-does-not-scroll-past-end [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   editor-render screen, <span class="Constant">2</span>:address:editor-data
   screen-should-contain [
    <span class="Constant"> .          .</span>
@@ -2840,11 +2840,11 @@ e]
   <span class="Comment"># screen has 1 line for menu + 3 lines for text</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># editor contains a long last line</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">cdefgh]</span>
   <span class="Comment"># editor screen triggers wrap of last line</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
   <span class="Comment"># some part of last line is not displayed</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
@@ -2873,9 +2873,9 @@ e]
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span>
   <span class="Comment"># and still has something left over</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">bcdefgh]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
   <span class="Comment"># some part of last line is not displayed</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
@@ -2903,11 +2903,11 @@ e]
 
 <span class="muScenario">scenario</span> editor-can-scroll-up [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .a         .</span>
@@ -2999,7 +2999,7 @@ e]
   <span class="Comment"># screen has 1 line for menu + 3 lines</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># initialize editor with 8 lines</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">c</span>
 <span class="Constant">d</span>
@@ -3007,7 +3007,7 @@ e]
 <span class="Constant">f</span>
 <span class="Constant">g</span>
 <span class="Constant">h]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">10/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .a         .</span>
@@ -3063,7 +3063,7 @@ e]
   <span class="Comment"># screen has 1 line for menu + 5 lines for text</span>
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">6/height</span>
   <span class="Comment"># editor contains a long line in the first page</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">b</span>
 <span class="Constant">cdefgh</span>
 <span class="Constant">i</span>
@@ -3074,7 +3074,7 @@ e]
 <span class="Constant">n</span>
 <span class="Constant">o]</span>
   <span class="Comment"># editor screen triggers wrap of last line</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
   <span class="Comment"># some part of last line is not displayed</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
@@ -3125,9 +3125,9 @@ e]
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># editor contains a very long line that occupies last two lines of screen</span>
   <span class="Comment"># and still has something left over</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[a</span>
 <span class="Constant">bcdefgh]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
   <span class="Comment"># some part of last line is not displayed</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
@@ -3168,7 +3168,7 @@ e]
 <span class="muScenario">scenario</span> editor-can-scroll-up-past-nonempty-lines [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># text with empty line in second screen</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[axx</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[axx</span>
 <span class="Constant">bxx</span>
 <span class="Constant">cxx</span>
 <span class="Constant">dxx</span>
@@ -3177,7 +3177,7 @@ e]
 <span class="Constant">gxx</span>
 <span class="Constant">hxx</span>
 <span class="Constant">]</span>
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .axx       .</span>
@@ -3226,7 +3226,7 @@ e]
 <span class="muScenario">scenario</span> editor-can-scroll-up-past-empty-lines [
   assume-screen <span class="Constant">10/width</span>, <span class="Constant">4/height</span>
   <span class="Comment"># text with empty line in second screen</span>
-  <span class="Constant">1</span>:address:array:character<span class="Special"> &lt;- </span>new <span class="Constant">[axy</span>
+  <span class="Constant">1</span>:text<span class="Special"> &lt;- </span>new <span class="Constant">[axy</span>
 <span class="Constant">bxy</span>
 <span class="Constant">cxy</span>
 
@@ -3235,7 +3235,7 @@ exy
 fxy
 gxy
 ]
-  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:address:array:character, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
+  <span class="Constant">2</span>:address:editor-data<span class="Special"> &lt;- </span>new-editor <span class="Constant">1</span>:text, screen:address:screen, <span class="Constant">0/left</span>, <span class="Constant">4/right</span>
   screen-should-contain [
    <span class="Constant"> .          .</span>
    <span class="Constant"> .axy       .</span>