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-rw-r--r--sandbox/004-programming-environment.mu2
-rw-r--r--sandbox/005-sandbox.mu96
-rw-r--r--sandbox/006-sandbox-copy.mu36
-rw-r--r--sandbox/007-sandbox-delete.mu48
-rw-r--r--sandbox/008-sandbox-edit.mu34
-rw-r--r--sandbox/009-sandbox-test.mu8
-rw-r--r--sandbox/010-sandbox-trace.mu24
-rw-r--r--sandbox/011-errors.mu48
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'                                    .
-    .━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━.
+    .──────────────────────────────────────────────────.
     .                                                  .
   ]
 ]
generated by cgit-pink 1.4.1-2-gfad0 (git 2.36.2.497.gbbea4dcf42) at 2024-06-01 14:10:50 +0000