3490

Redo commit 3457.

Basically there were 3 unicode characters we changed back then:
  solid horizontal line: 9473 -> 9472
  fuzzy horizontal line: 9480 -> 9548
  fuzzy vertical line: 9482 -> 9550

The solid horizontal line has no issues, so we just redo it here.
For the other two, we'll perform the substitution only when rendering
html. That gives us the best of both worlds: the scenario screens render
right in html, and alt-tabbing continues to be snappy when running the
edit/ app.

8 files changed, 148 insertions, 148 deletions

diff --git a/sandbox/004-programming-environment.mu b/sandbox/004-programming-environment.mu
index f39f0b35..af136deb 100644
--- a/sandbox/004-programming-environment.mu
+++ b/sandbox/004-programming-environment.mu
@@ -269,7 +269,7 @@ def render-sandbox-side screen:&:screen, env:&:environment, {render-editor: (rec
   clear-line-until screen, right
   row <- add row, 1
   # draw solid line after code (you'll see why in later layers)
-  draw-horizontal screen, row, left, right, 9473/horizontal
+  draw-horizontal screen, row, left, right
   row <- add row, 1
   clear-screen-from screen, row, left, left, right
 ]
diff --git a/sandbox/005-sandbox.mu b/sandbox/005-sandbox.mu
index cd37e7a8..45dc259c 100644
--- a/sandbox/005-sandbox.mu
+++ b/sandbox/005-sandbox.mu
@@ -45,12 +45,12 @@ scenario run-and-show-results [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .divide-with-remainder 11, 3                       .
     .3                                                 .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   screen-should-contain-in-color 7/white, [
@@ -67,12 +67,12 @@ scenario run-and-show-results [
   screen-should-contain-in-color 245/grey, [
     .                                                  .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
     .3                                                 .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # run another command
@@ -88,16 +88,16 @@ scenario run-and-show-results [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .divide-with-remainder 11, 3                       .
     .3                                                 .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -236,7 +236,7 @@ def! render-sandbox-side screen:&:screen, env:&:environment, {render-editor: (re
     row <- add row, 1
   }
   # render sandboxes
-  draw-horizontal screen, row, left, right, 9473/horizontal-double
+  draw-horizontal screen, row, left, right
   sandbox:&:sandbox <- get *env, sandbox:offset
   row, screen <- render-sandboxes screen, sandbox, left, right, row, render-from, 0, env
   clear-rest-of-screen screen, row, left, right
@@ -283,7 +283,7 @@ def render-sandboxes screen:&:screen, sandbox:&:sandbox, left:num, right:num, ro
     at-bottom?:bool <- greater-or-equal row, screen-height
     return-if at-bottom?
     # draw solid line after sandbox
-    draw-horizontal screen, row, left, right, 9473/horizontal-double
+    draw-horizontal screen, row, left, right
   }
   # if hidden, reset row attributes
   {
@@ -521,11 +521,11 @@ reply z
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # make a change (incrementing one of the args to 'add'), then rerun
@@ -545,11 +545,11 @@ return z
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .5                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -571,7 +571,7 @@ scenario run-instruction-manages-screen-per-sandbox [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .print-integer screen, 4                           .
     .screen:                                           .
@@ -580,7 +580,7 @@ scenario run-instruction-manages-screen-per-sandbox [
     .  .                              .                .
     .  .                              .                .
     .  .                              .                .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -639,11 +639,11 @@ scenario scrolling-down-past-bottom-of-sandbox-editor [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-down'
@@ -659,11 +659,11 @@ scenario scrolling-down-past-bottom-of-sandbox-editor [
   # cursor moves to first sandbox
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .␣   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-up'
@@ -679,11 +679,11 @@ scenario scrolling-down-past-bottom-of-sandbox-editor [
   screen-should-contain [
     .                               run (F4)           .
     .␣                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -781,15 +781,15 @@ scenario scrolling-through-multiple-sandboxes [
   screen-should-contain [
     .                               run (F4)           .
     .␣                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-down'
@@ -805,15 +805,15 @@ scenario scrolling-through-multiple-sandboxes [
   # cursor moves to first sandbox
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .␣   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-down' again
@@ -826,11 +826,11 @@ scenario scrolling-through-multiple-sandboxes [
   # just second sandbox displayed
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-down' again
@@ -843,11 +843,11 @@ scenario scrolling-through-multiple-sandboxes [
   # no change
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-up'
@@ -860,15 +860,15 @@ scenario scrolling-through-multiple-sandboxes [
   # back to displaying both sandboxes without editor
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-up' again
@@ -884,15 +884,15 @@ scenario scrolling-through-multiple-sandboxes [
   screen-should-contain [
     .                               run (F4)           .
     .␣                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-up' again
@@ -908,15 +908,15 @@ scenario scrolling-through-multiple-sandboxes [
   screen-should-contain [
     .                               run (F4)           .
     .␣                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -938,11 +938,11 @@ scenario scrolling-manages-sandbox-index-correctly [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-down' and 'page-up' a couple of times. sandbox index should be stable
@@ -956,11 +956,11 @@ scenario scrolling-manages-sandbox-index-correctly [
   # cursor moves to first sandbox
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-up' again
@@ -974,11 +974,11 @@ scenario scrolling-manages-sandbox-index-correctly [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # hit 'page-down'
@@ -992,11 +992,11 @@ scenario scrolling-manages-sandbox-index-correctly [
   # cursor moves to first sandbox
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .  # no change
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
diff --git a/sandbox/006-sandbox-copy.mu b/sandbox/006-sandbox-copy.mu
index 784ae1eb..fdc1409a 100644
--- a/sandbox/006-sandbox-copy.mu
+++ b/sandbox/006-sandbox-copy.mu
@@ -13,11 +13,11 @@ scenario copy-a-sandbox-to-editor [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
     .                                                  .
@@ -33,11 +33,11 @@ scenario copy-a-sandbox-to-editor [
   screen-should-contain [
     .                               run (F4)           .
     .add 1, 1                                          .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
     .                                                  .
@@ -52,11 +52,11 @@ scenario copy-a-sandbox-to-editor [
   screen-should-contain [
     .                               run (F4)           .
     .0add 1, 1                                         .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
     .                                                  .
@@ -75,11 +75,11 @@ scenario copy-a-sandbox-to-editor-2 [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
     .                                                  .
@@ -95,11 +95,11 @@ scenario copy-a-sandbox-to-editor-2 [
   screen-should-contain [
     .                               run (F4)           .
     .add 1, 1                                          .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
     .                                                  .
@@ -114,11 +114,11 @@ scenario copy-a-sandbox-to-editor-2 [
   screen-should-contain [
     .                               run (F4)           .
     .0add 1, 1                                         .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
     .                                                  .
@@ -226,11 +226,11 @@ scenario copy-fails-if-sandbox-editor-not-empty [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # type something into the sandbox editor, then click on the 'copy' button
@@ -246,11 +246,11 @@ scenario copy-fails-if-sandbox-editor-not-empty [
   screen-should-contain [
     .                               run (F4)           .
     .0                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # cursor should be in the right place
@@ -263,11 +263,11 @@ scenario copy-fails-if-sandbox-editor-not-empty [
   screen-should-contain [
     .                               run (F4)           .
     .01                                                .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
diff --git a/sandbox/007-sandbox-delete.mu b/sandbox/007-sandbox-delete.mu
index ff04344f..dba40a8f 100644
--- a/sandbox/007-sandbox-delete.mu
+++ b/sandbox/007-sandbox-delete.mu
@@ -16,16 +16,16 @@ scenario deleting-sandboxes [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .divide-with-remainder 11, 3                       .
     .3                                                 .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # delete second sandbox by clicking on left edge of 'delete' button
@@ -38,11 +38,11 @@ scenario deleting-sandboxes [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # delete first sandbox by clicking at right edge of 'delete' button
@@ -55,7 +55,7 @@ scenario deleting-sandboxes [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -162,15 +162,15 @@ scenario deleting-sandbox-after-scroll [
   event-loop screen, console, env
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
   ]
   # delete the second sandbox
   assume-console [
@@ -182,11 +182,11 @@ scenario deleting-sandbox-after-scroll [
   # second sandbox shows in editor; scroll resets to display first sandbox
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -210,15 +210,15 @@ scenario deleting-top-sandbox-after-scroll [
   event-loop screen, console, env
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
   ]
   # delete the second sandbox
   assume-console [
@@ -230,11 +230,11 @@ scenario deleting-top-sandbox-after-scroll [
   # second sandbox shows in editor; scroll resets to display first sandbox
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -259,11 +259,11 @@ scenario deleting-final-sandbox-after-scroll [
   event-loop screen, console, env
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # delete the second sandbox
@@ -277,11 +277,11 @@ scenario deleting-final-sandbox-after-scroll [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -305,11 +305,11 @@ scenario deleting-updates-sandbox-count [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
@@ -326,11 +326,11 @@ scenario deleting-updates-sandbox-count [
   # shouldn't go past last sandbox
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
diff --git a/sandbox/008-sandbox-edit.mu b/sandbox/008-sandbox-edit.mu
index 533e664c..42778faa 100644
--- a/sandbox/008-sandbox-edit.mu
+++ b/sandbox/008-sandbox-edit.mu
@@ -13,11 +13,11 @@ scenario clicking-on-a-sandbox-moves-it-to-editor [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # click somewhere on the sandbox
@@ -31,7 +31,7 @@ scenario clicking-on-a-sandbox-moves-it-to-editor [
   screen-should-contain [
     .                               run (F4)           .
     .add 2, 2                                          .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # cursor should be in the right place
@@ -44,7 +44,7 @@ scenario clicking-on-a-sandbox-moves-it-to-editor [
   screen-should-contain [
     .                               run (F4)           .
     .0add 2, 2                                         .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -114,7 +114,7 @@ scenario sandbox-with-print-can-be-edited [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .print-integer screen, 4                           .
     .screen:                                           .
@@ -123,7 +123,7 @@ scenario sandbox-with-print-can-be-edited [
     .  .                              .                .
     .  .                              .                .
     .  .                              .                .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # edit the sandbox
@@ -136,7 +136,7 @@ scenario sandbox-with-print-can-be-edited [
   screen-should-contain [
     .                               run (F4)           .
     .print-integer screen, 4                           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
   ]
@@ -162,11 +162,11 @@ scenario editing-sandbox-after-scrolling-resets-scroll [
   event-loop screen, console, env
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # edit the second sandbox
@@ -180,11 +180,11 @@ scenario editing-sandbox-after-scrolling-resets-scroll [
   screen-should-contain [
     .                               run (F4)           .
     .add 2, 2                                          .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -208,11 +208,11 @@ scenario editing-sandbox-updates-sandbox-count [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
   ]
   # edit the second sandbox, then resave
@@ -227,11 +227,11 @@ scenario editing-sandbox-updates-sandbox-count [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 1, 1                                          .
     .2                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
   ]
   # now try to scroll past end
@@ -246,11 +246,11 @@ scenario editing-sandbox-updates-sandbox-count [
   # screen should show just final sandbox
   screen-should-contain [
     .                               run (F4)           .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .1   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
diff --git a/sandbox/009-sandbox-test.mu b/sandbox/009-sandbox-test.mu
index eb7fc274..f27b4a06 100644
--- a/sandbox/009-sandbox-test.mu
+++ b/sandbox/009-sandbox-test.mu
@@ -18,11 +18,11 @@ recipe foo [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # click on the '4' in the result
@@ -50,11 +50,11 @@ recipe foo [
   screen-should-contain [
     .                               run (F4)           .
     .␣                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # now change the result
diff --git a/sandbox/010-sandbox-trace.mu b/sandbox/010-sandbox-trace.mu
index 5116b43b..15a4f931 100644
--- a/sandbox/010-sandbox-trace.mu
+++ b/sandbox/010-sandbox-trace.mu
@@ -13,10 +13,10 @@ scenario sandbox-click-on-code-toggles-app-trace [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .stash [abc]                                       .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # click on the code in the sandbox
@@ -32,7 +32,7 @@ scenario sandbox-click-on-code-toggles-app-trace [
   screen-should-contain [
     .                               run (F4)           .
     .␣                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .stash [abc]                                       .
     .abc                                               .
@@ -40,7 +40,7 @@ scenario sandbox-click-on-code-toggles-app-trace [
   screen-should-contain-in-color 245/grey, [
     .                                                  .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
     .                                                  .
     .abc                                               .
@@ -57,10 +57,10 @@ scenario sandbox-click-on-code-toggles-app-trace [
   screen-should-contain [
     .                               run (F4)           .
     .␣                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .stash [abc]                                       .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -80,12 +80,12 @@ add 2, 2]
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .stash [abc]                                       .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # click on the code in the sandbox
@@ -99,14 +99,14 @@ add 2, 2]
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .stash [abc]                                       .
     .add 2, 2                                          .
     .abc                                               .
     .7 instructions run                                .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
   ]
 ]
 
@@ -124,7 +124,7 @@ scenario clicking-on-app-trace-does-nothing [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .stash 123456789                                   .
     .123456789                                         .
@@ -140,7 +140,7 @@ scenario clicking-on-app-trace-does-nothing [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .stash 123456789                                   .
     .123456789                                         .
diff --git a/sandbox/011-errors.mu b/sandbox/011-errors.mu
index b420ed6b..bd6d4e7c 100644
--- a/sandbox/011-errors.mu
+++ b/sandbox/011-errors.mu
@@ -142,7 +142,7 @@ recipe foo [
   screen-should-contain [
     .  errors found                 run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .foo: unknown element 'foo' in container 'number'  .
@@ -224,11 +224,11 @@ scenario run-hides-errors-from-past-sandboxes [
   screen-should-contain [
     .                               run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .add 2, 2                                          .
     .4                                                 .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -252,12 +252,12 @@ z <- add x, y
   screen-should-contain [
     .  errors found (0)             run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo 2                                             .
     .foo_2: 'add' requires number ingredients, but got↩.
     . 'y'                                              .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # now rerun everything
@@ -271,12 +271,12 @@ z <- add x, y
   screen-should-contain [
     .  errors found (0)             run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo 2                                             .
     .foo_3: 'add' requires number ingredients, but got↩.
     . 'y'                                              .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -348,7 +348,7 @@ recipe foo [
   screen-should-contain [
     .  errors found                 run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .foo: missing type for 'x' in 'x <- copy 0'        .
@@ -374,12 +374,12 @@ recipe foo \\[
   screen-should-contain [
     .  errors found                 run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .9: unbalanced '\\[' for recipe                      .
     .9: unbalanced '\\[' for recipe                      .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -404,7 +404,7 @@ recipe foo [
   screen-should-contain [
     .  errors found                 run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .foo: first ingredient of 'get' should be a contai↩.
@@ -433,7 +433,7 @@ recipe foo [
   screen-should-contain [
     .  errors found                 run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .foo: second ingredient of 'get' should have type ↩.
@@ -459,7 +459,7 @@ recipe foo [
   screen-should-contain [
     .  errors found                 run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .foo: use before set: 'y'                          .
@@ -474,7 +474,7 @@ recipe foo [
   screen-should-contain [
     .  errors found                 run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo                                               .
     .foo: use before set: 'y'                          .
@@ -496,12 +496,12 @@ scenario run-instruction-and-print-errors [
   screen-should-contain [
     .  errors found (0)             run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .get 1:&:point, 1:offset                           .
     .first ingredient of 'get' should be a container, ↩.
     .but got '1:&:point'                               .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   screen-should-contain-in-color 1/red, [
@@ -536,13 +536,13 @@ scenario run-instruction-and-print-errors-only-once [
   screen-should-contain [
     .  errors found (0)             run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .get 1234:num, foo:offset                          .
     .unknown element 'foo' in container 'number'       .
     .first ingredient of 'get' should be a container, ↩.
     .but got '1234:num'                                .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -566,13 +566,13 @@ loop
   screen-should-contain [
     .  errors found (0)             run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .{                                                 .
     .loop                                              .
     .}                                                 .
     .took too long!                                    .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
@@ -600,12 +600,12 @@ reply b
   screen-should-contain [
     .  errors found (0)             run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo 4, 0                                          .
     .foo: divide by zero in '_, c:num <- divide-with-r↩.
     .emainder a, b'                                    .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
   # click on the call in the sandbox
@@ -619,14 +619,14 @@ reply b
   screen-should-contain [
     .  errors found (0)             run (F4)           .
     .                                                  .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .0   edit           copy           delete          .
     .foo 4, 0                                          .
     .dividing by 0                                     .
     .14 instructions run                               .
     .foo: divide by zero in '_, c:num <- divide-with-r↩.
     .emainder a, b'                                    .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]