about summary refs log tree commit diff stats
path: root/html/edit/010-sandbox-trace.mu.html
diff options
context:
space:
mode:
Diffstat (limited to 'html/edit/010-sandbox-trace.mu.html')
-rw-r--r--html/edit/010-sandbox-trace.mu.html247
1 files changed, 124 insertions, 123 deletions
diff --git a/html/edit/010-sandbox-trace.mu.html b/html/edit/010-sandbox-trace.mu.html
index caafdea5..99709a40 100644
--- a/html/edit/010-sandbox-trace.mu.html
+++ b/html/edit/010-sandbox-trace.mu.html
@@ -15,16 +15,17 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 a { text-decoration: none; }
 a:hover { text-decoration: underline; }
 * { font-size: 12pt; font-size: 1em; }
-.muData { color: #ffff00; }
-.muControl { color: #c0a020; }
+.Conceal { color: #4e4e4e; }
+.muScenario { color: #00af00; }
 .Special { color: #c00000; }
 .Delimiter { color: #800080; }
 .SalientComment { color: #00ffff; }
 .Constant { color: #00a0a0; }
 .LineNr { color: #444444; }
-.Comment { color: #9090ff; }
 .muRecipe { color: #ff8700; }
-.muScenario { color: #00af00; }
+.Comment { color: #9090ff; }
+.muControl { color: #c0a020; }
+.muData { color: #ffff00; }
 -->
 </style>
 
@@ -67,70 +68,70 @@ if ('onhashchange' in window) {
 <span id="L6" class="LineNr">  6 </span>  assume-screen <span class="Constant">100/width</span>, <span class="Constant">10/height</span>
 <span id="L7" class="LineNr">  7 </span>  <span class="Comment"># basic recipe</span>
 <span id="L8" class="LineNr">  8 </span>  assume-resources [
-<span id="L9" class="LineNr">  9 </span>    <span class="Constant">[lesson/recipes.mu]</span> <span class="Special">&lt;-</span> [
-<span id="L10" class="LineNr"> 10 </span>      <span class="Constant">|recipe</span> foo <span class="Constant">[|</span>
-<span id="L11" class="LineNr"> 11 </span><span class="Constant">      |  stash [abc]</span>|
-<span id="L12" class="LineNr"> 12 </span><span class="Constant">      |]|</span>
-<span id="L13" class="LineNr"> 13 </span>    ]
+<span id="L9" class="LineNr">  9 </span>  <span class="Conceal">¦</span> <span class="Constant">[lesson/recipes.mu]</span> <span class="Special">&lt;-</span> [
+<span id="L10" class="LineNr"> 10 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Constant">|recipe</span> foo <span class="Constant">[|</span>
+<span id="L11" class="LineNr"> 11 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> </span><span class="Conceal">¦</span><span class="Constant"> |  stash [abc]</span>|
+<span id="L12" class="LineNr"> 12 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> </span><span class="Conceal">¦</span><span class="Constant"> |]|</span>
+<span id="L13" class="LineNr"> 13 </span>  <span class="Conceal">¦</span> ]
 <span id="L14" class="LineNr"> 14 </span>  ]
 <span id="L15" class="LineNr"> 15 </span>  env:&amp;:environment <span class="Special">&lt;-</span> <a href='004-programming-environment.mu.html#L21'>new-programming-environment</a> <a href='../088file.mu.html#L11'>resources</a>, <a href='../081print.mu.html#L4'>screen</a>, <span class="Constant">[foo]</span>
 <span id="L16" class="LineNr"> 16 </span>  <span class="Comment"># run it</span>
 <span id="L17" class="LineNr"> 17 </span>  assume-console [
-<span id="L18" class="LineNr"> 18 </span>    press F4
+<span id="L18" class="LineNr"> 18 </span>  <span class="Conceal">¦</span> press F4
 <span id="L19" class="LineNr"> 19 </span>  ]
 <span id="L20" class="LineNr"> 20 </span>  <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
 <span id="L21" class="LineNr"> 21 </span>  screen-should-contain [
-<span id="L22" class="LineNr"> 22 </span>   <span class="Constant"> .                                                                                 run (F4)           .</span>
-<span id="L23" class="LineNr"> 23 </span>   <span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
-<span id="L24" class="LineNr"> 24 </span>   <span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
-<span id="L25" class="LineNr"> 25 </span>   <span class="Constant"> .]                                                 ╎0   edit          copy            delete         .</span>
-<span id="L26" class="LineNr"> 26 </span>   <span class="Constant"> .                                                  ╎foo                                              .</span>
-<span id="L27" class="LineNr"> 27 </span><span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
-<span id="L28" class="LineNr"> 28 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L22" class="LineNr"> 22 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                                                 run (F4)           .</span>
+<span id="L23" class="LineNr"> 23 </span>  <span class="Conceal">¦</span><span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
+<span id="L24" class="LineNr"> 24 </span>  <span class="Conceal">¦</span><span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
+<span id="L25" class="LineNr"> 25 </span>  <span class="Conceal">¦</span><span class="Constant"> .]                                                 ╎0   edit          copy            delete         .</span>
+<span id="L26" class="LineNr"> 26 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎foo                                              .</span>
+<span id="L27" class="LineNr"> 27 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
+<span id="L28" class="LineNr"> 28 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
 <span id="L29" class="LineNr"> 29 </span>  ]
 <span id="L30" class="LineNr"> 30 </span>  <span class="Comment"># click on the code in the sandbox</span>
 <span id="L31" class="LineNr"> 31 </span>  assume-console [
-<span id="L32" class="LineNr"> 32 </span>    left-click<span class="Constant"> 4</span>,<span class="Constant"> 51</span>
+<span id="L32" class="LineNr"> 32 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 4</span>,<span class="Constant"> 51</span>
 <span id="L33" class="LineNr"> 33 </span>  ]
 <span id="L34" class="LineNr"> 34 </span>  run [
-<span id="L35" class="LineNr"> 35 </span>    <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
-<span id="L36" class="LineNr"> 36 </span>    cursor:char <span class="Special">&lt;-</span> copy <span class="Constant">9251/␣</span>
-<span id="L37" class="LineNr"> 37 </span>    print <a href='../081print.mu.html#L4'>screen</a>, cursor
+<span id="L35" class="LineNr"> 35 </span>  <span class="Conceal">¦</span> <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
+<span id="L36" class="LineNr"> 36 </span>  <span class="Conceal">¦</span> cursor:char <span class="Special">&lt;-</span> copy <span class="Constant">9251/␣</span>
+<span id="L37" class="LineNr"> 37 </span>  <span class="Conceal">¦</span> print <a href='../081print.mu.html#L4'>screen</a>, cursor
 <span id="L38" class="LineNr"> 38 </span>  ]
 <span id="L39" class="LineNr"> 39 </span>  <span class="Comment"># trace now printed and cursor shouldn't have budged</span>
 <span id="L40" class="LineNr"> 40 </span>  screen-should-contain [
-<span id="L41" class="LineNr"> 41 </span>   <span class="Constant"> .                                                                                 run (F4)           .</span>
-<span id="L42" class="LineNr"> 42 </span>   <span class="Constant"> .␣ecipe foo [                                      ╎                                                 .</span>
-<span id="L43" class="LineNr"> 43 </span>   <span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
-<span id="L44" class="LineNr"> 44 </span>   <span class="Constant"> .]                                                 ╎0   edit          copy            delete         .</span>
-<span id="L45" class="LineNr"> 45 </span>   <span class="Constant"> .                                                  ╎foo                                              .</span>
-<span id="L46" class="LineNr"> 46 </span>   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎abc                                              .</span>
+<span id="L41" class="LineNr"> 41 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                                                 run (F4)           .</span>
+<span id="L42" class="LineNr"> 42 </span>  <span class="Conceal">¦</span><span class="Constant"> .␣ecipe foo [                                      ╎                                                 .</span>
+<span id="L43" class="LineNr"> 43 </span>  <span class="Conceal">¦</span><span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
+<span id="L44" class="LineNr"> 44 </span>  <span class="Conceal">¦</span><span class="Constant"> .]                                                 ╎0   edit          copy            delete         .</span>
+<span id="L45" class="LineNr"> 45 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎foo                                              .</span>
+<span id="L46" class="LineNr"> 46 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎abc                                              .</span>
 <span id="L47" class="LineNr"> 47 </span>  ]
 <span id="L48" class="LineNr"> 48 </span>  screen-should-contain-in-color <span class="Constant">245/grey</span>, [
-<span id="L49" class="LineNr"> 49 </span>   <span class="Constant"> .                                                                                                    .</span>
-<span id="L50" class="LineNr"> 50 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
-<span id="L51" class="LineNr"> 51 </span>   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
-<span id="L52" class="LineNr"> 52 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
-<span id="L53" class="LineNr"> 53 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
-<span id="L54" class="LineNr"> 54 </span>   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎abc                                              .</span>
+<span id="L49" class="LineNr"> 49 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                                                                    .</span>
+<span id="L50" class="LineNr"> 50 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L51" class="LineNr"> 51 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
+<span id="L52" class="LineNr"> 52 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L53" class="LineNr"> 53 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L54" class="LineNr"> 54 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎abc                                              .</span>
 <span id="L55" class="LineNr"> 55 </span>  ]
 <span id="L56" class="LineNr"> 56 </span>  <span class="Comment"># click again on the same region</span>
 <span id="L57" class="LineNr"> 57 </span>  assume-console [
-<span id="L58" class="LineNr"> 58 </span>    left-click<span class="Constant"> 4</span>,<span class="Constant"> 55</span>
+<span id="L58" class="LineNr"> 58 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 4</span>,<span class="Constant"> 55</span>
 <span id="L59" class="LineNr"> 59 </span>  ]
 <span id="L60" class="LineNr"> 60 </span>  run [
-<span id="L61" class="LineNr"> 61 </span>    <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
-<span id="L62" class="LineNr"> 62 </span>    print <a href='../081print.mu.html#L4'>screen</a>, cursor
+<span id="L61" class="LineNr"> 61 </span>  <span class="Conceal">¦</span> <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
+<span id="L62" class="LineNr"> 62 </span>  <span class="Conceal">¦</span> print <a href='../081print.mu.html#L4'>screen</a>, cursor
 <span id="L63" class="LineNr"> 63 </span>  ]
 <span id="L64" class="LineNr"> 64 </span>  <span class="Comment"># trace hidden again</span>
 <span id="L65" class="LineNr"> 65 </span>  screen-should-contain [
-<span id="L66" class="LineNr"> 66 </span>   <span class="Constant"> .                                                                                 run (F4)           .</span>
-<span id="L67" class="LineNr"> 67 </span>   <span class="Constant"> .␣ecipe foo [                                      ╎                                                 .</span>
-<span id="L68" class="LineNr"> 68 </span>   <span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
-<span id="L69" class="LineNr"> 69 </span>   <span class="Constant"> .]                                                 ╎0   edit          copy            delete         .</span>
-<span id="L70" class="LineNr"> 70 </span>   <span class="Constant"> .                                                  ╎foo                                              .</span>
-<span id="L71" class="LineNr"> 71 </span><span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
-<span id="L72" class="LineNr"> 72 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L66" class="LineNr"> 66 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                                                 run (F4)           .</span>
+<span id="L67" class="LineNr"> 67 </span>  <span class="Conceal">¦</span><span class="Constant"> .␣ecipe foo [                                      ╎                                                 .</span>
+<span id="L68" class="LineNr"> 68 </span>  <span class="Conceal">¦</span><span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
+<span id="L69" class="LineNr"> 69 </span>  <span class="Conceal">¦</span><span class="Constant"> .]                                                 ╎0   edit          copy            delete         .</span>
+<span id="L70" class="LineNr"> 70 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎foo                                              .</span>
+<span id="L71" class="LineNr"> 71 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
+<span id="L72" class="LineNr"> 72 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
 <span id="L73" class="LineNr"> 73 </span>  ]
 <span id="L74" class="LineNr"> 74 </span>]
 <span id="L75" class="LineNr"> 75 </span>
@@ -140,48 +141,48 @@ if ('onhashchange' in window) {
 <span id="L79" class="LineNr"> 79 </span>  assume-screen <span class="Constant">100/width</span>, <span class="Constant">10/height</span>
 <span id="L80" class="LineNr"> 80 </span>  <span class="Comment"># basic recipe</span>
 <span id="L81" class="LineNr"> 81 </span>  assume-resources [
-<span id="L82" class="LineNr"> 82 </span>    <span class="Constant">[lesson/recipes.mu]</span> <span class="Special">&lt;-</span> [
-<span id="L83" class="LineNr"> 83 </span>      <span class="Constant">|recipe</span> foo <span class="Constant">[|</span>
-<span id="L84" class="LineNr"> 84 </span><span class="Constant">      |  stash [abc]</span>|
-<span id="L85" class="LineNr"> 85 </span>      <span class="Constant">|</span>  <span class="muControl">reply</span> 4|
-<span id="L86" class="LineNr"> 86 </span><span class="Constant">      |]|</span>
-<span id="L87" class="LineNr"> 87 </span>    ]
+<span id="L82" class="LineNr"> 82 </span>  <span class="Conceal">¦</span> <span class="Constant">[lesson/recipes.mu]</span> <span class="Special">&lt;-</span> [
+<span id="L83" class="LineNr"> 83 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Constant">|recipe</span> foo <span class="Constant">[|</span>
+<span id="L84" class="LineNr"> 84 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> </span><span class="Conceal">¦</span><span class="Constant"> |  stash [abc]</span>|
+<span id="L85" class="LineNr"> 85 </span>  <span class="Conceal">¦</span> <span class="Conceal">¦</span> <span class="Constant">|</span>  <span class="muControl">reply</span> 4|
+<span id="L86" class="LineNr"> 86 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> </span><span class="Conceal">¦</span><span class="Constant"> |]|</span>
+<span id="L87" class="LineNr"> 87 </span>  <span class="Conceal">¦</span> ]
 <span id="L88" class="LineNr"> 88 </span>  ]
 <span id="L89" class="LineNr"> 89 </span>  env:&amp;:environment <span class="Special">&lt;-</span> <a href='004-programming-environment.mu.html#L21'>new-programming-environment</a> <a href='../088file.mu.html#L11'>resources</a>, <a href='../081print.mu.html#L4'>screen</a>, <span class="Constant">[foo]</span>
 <span id="L90" class="LineNr"> 90 </span>  <span class="Comment"># run it</span>
 <span id="L91" class="LineNr"> 91 </span>  assume-console [
-<span id="L92" class="LineNr"> 92 </span>    press F4
+<span id="L92" class="LineNr"> 92 </span>  <span class="Conceal">¦</span> press F4
 <span id="L93" class="LineNr"> 93 </span>  ]
 <span id="L94" class="LineNr"> 94 </span>  <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
 <span id="L95" class="LineNr"> 95 </span>  screen-should-contain [
-<span id="L96" class="LineNr"> 96 </span>   <span class="Constant"> .                                                                                 run (F4)           .</span>
-<span id="L97" class="LineNr"> 97 </span>   <span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
-<span id="L98" class="LineNr"> 98 </span>   <span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
-<span id="L99" class="LineNr"> 99 </span>   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
-<span id="L100" class="LineNr">100 </span>   <span class="Constant"> .]                                                 ╎foo                                              .</span>
-<span id="L101" class="LineNr">101 </span>   <span class="Constant"> .                                                  ╎4                                                .</span>
-<span id="L102" class="LineNr">102 </span><span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
-<span id="L103" class="LineNr">103 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L96" class="LineNr"> 96 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                                                 run (F4)           .</span>
+<span id="L97" class="LineNr"> 97 </span>  <span class="Conceal">¦</span><span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
+<span id="L98" class="LineNr"> 98 </span>  <span class="Conceal">¦</span><span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
+<span id="L99" class="LineNr"> 99 </span>  <span class="Conceal">¦</span><span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
+<span id="L100" class="LineNr">100 </span>  <span class="Conceal">¦</span><span class="Constant"> .]                                                 ╎foo                                              .</span>
+<span id="L101" class="LineNr">101 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎4                                                .</span>
+<span id="L102" class="LineNr">102 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
+<span id="L103" class="LineNr">103 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
 <span id="L104" class="LineNr">104 </span>  ]
 <span id="L105" class="LineNr">105 </span>  <span class="Comment"># click on the code in the sandbox</span>
 <span id="L106" class="LineNr">106 </span>  assume-console [
-<span id="L107" class="LineNr">107 </span>    left-click<span class="Constant"> 4</span>,<span class="Constant"> 51</span>
+<span id="L107" class="LineNr">107 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 4</span>,<span class="Constant"> 51</span>
 <span id="L108" class="LineNr">108 </span>  ]
 <span id="L109" class="LineNr">109 </span>  run [
-<span id="L110" class="LineNr">110 </span>    <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
+<span id="L110" class="LineNr">110 </span>  <span class="Conceal">¦</span> <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
 <span id="L111" class="LineNr">111 </span>  ]
 <span id="L112" class="LineNr">112 </span>  <span class="Comment"># trace now printed above result</span>
 <span id="L113" class="LineNr">113 </span>  screen-should-contain [
-<span id="L114" class="LineNr">114 </span>   <span class="Constant"> .                                                                                 run (F4)           .</span>
-<span id="L115" class="LineNr">115 </span>   <span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
-<span id="L116" class="LineNr">116 </span>   <span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
-<span id="L117" class="LineNr">117 </span>   <span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
-<span id="L118" class="LineNr">118 </span>   <span class="Constant"> .]                                                 ╎foo                                              .</span>
-<span id="L119" class="LineNr">119 </span>   <span class="Constant"> .                                                  ╎abc                                              .</span>
-<span id="L120" class="LineNr">120 </span>   <span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎8 instructions run                               .</span>
-<span id="L121" class="LineNr">121 </span>   <span class="Constant"> .                                                  ╎4                                                .</span>
-<span id="L122" class="LineNr">122 </span>   <span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
-<span id="L123" class="LineNr">123 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L114" class="LineNr">114 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                                                 run (F4)           .</span>
+<span id="L115" class="LineNr">115 </span>  <span class="Conceal">¦</span><span class="Constant"> .recipe foo [                                      ╎                                                 .</span>
+<span id="L116" class="LineNr">116 </span>  <span class="Conceal">¦</span><span class="Constant"> .  stash [abc]                                     ╎─────────────────────────────────────────────────.</span>
+<span id="L117" class="LineNr">117 </span>  <span class="Conceal">¦</span><span class="Constant"> .  reply 4                                         ╎0   edit          copy            delete         .</span>
+<span id="L118" class="LineNr">118 </span>  <span class="Conceal">¦</span><span class="Constant"> .]                                                 ╎foo                                              .</span>
+<span id="L119" class="LineNr">119 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎abc                                              .</span>
+<span id="L120" class="LineNr">120 </span>  <span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎8 instructions run                               .</span>
+<span id="L121" class="LineNr">121 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎4                                                .</span>
+<span id="L122" class="LineNr">122 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎─────────────────────────────────────────────────.</span>
+<span id="L123" class="LineNr">123 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
 <span id="L124" class="LineNr">124 </span>  ]
 <span id="L125" class="LineNr">125 </span>]
 <span id="L126" class="LineNr">126 </span>
@@ -194,33 +195,33 @@ if ('onhashchange' in window) {
 <span id="L133" class="LineNr">133 </span>  env:&amp;:environment <span class="Special">&lt;-</span> <a href='004-programming-environment.mu.html#L21'>new-programming-environment</a> <a href='../088file.mu.html#L11'>resources</a>, <a href='../081print.mu.html#L4'>screen</a>, <span class="Constant">[stash 123456789]</span>
 <span id="L134" class="LineNr">134 </span>  <span class="Comment"># create and expand the trace</span>
 <span id="L135" class="LineNr">135 </span>  assume-console [
-<span id="L136" class="LineNr">136 </span>    press F4
-<span id="L137" class="LineNr">137 </span>    left-click<span class="Constant"> 4</span>,<span class="Constant"> 51</span>
+<span id="L136" class="LineNr">136 </span>  <span class="Conceal">¦</span> press F4
+<span id="L137" class="LineNr">137 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 4</span>,<span class="Constant"> 51</span>
 <span id="L138" class="LineNr">138 </span>  ]
 <span id="L139" class="LineNr">139 </span>  <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
 <span id="L140" class="LineNr">140 </span>  screen-should-contain [
-<span id="L141" class="LineNr">141 </span>   <span class="Constant"> .                                                                                 run (F4)           .</span>
-<span id="L142" class="LineNr">142 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
-<span id="L143" class="LineNr">143 </span><span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
-<span id="L144" class="LineNr">144 </span>   <span class="Constant"> .                                                  ╎0   edit          copy            delete         .</span>
-<span id="L145" class="LineNr">145 </span>   <span class="Constant"> .                                                  ╎stash 123456789                                  .</span>
-<span id="L146" class="LineNr">146 </span>   <span class="Constant"> .                                                  ╎123456789                                        .</span>
+<span id="L141" class="LineNr">141 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                                                 run (F4)           .</span>
+<span id="L142" class="LineNr">142 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L143" class="LineNr">143 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
+<span id="L144" class="LineNr">144 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎0   edit          copy            delete         .</span>
+<span id="L145" class="LineNr">145 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎stash 123456789                                  .</span>
+<span id="L146" class="LineNr">146 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎123456789                                        .</span>
 <span id="L147" class="LineNr">147 </span>  ]
 <span id="L148" class="LineNr">148 </span>  <span class="Comment"># click on the stash under the edit-button region (or any of the other buttons, really)</span>
 <span id="L149" class="LineNr">149 </span>  assume-console [
-<span id="L150" class="LineNr">150 </span>    left-click<span class="Constant"> 5</span>,<span class="Constant"> 57</span>
+<span id="L150" class="LineNr">150 </span>  <span class="Conceal">¦</span> left-click<span class="Constant"> 5</span>,<span class="Constant"> 57</span>
 <span id="L151" class="LineNr">151 </span>  ]
 <span id="L152" class="LineNr">152 </span>  run [
-<span id="L153" class="LineNr">153 </span>    <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
+<span id="L153" class="LineNr">153 </span>  <span class="Conceal">¦</span> <a href='004-programming-environment.mu.html#L39'>event-loop</a> <a href='../081print.mu.html#L4'>screen</a>, <a href='../084console.mu.html#L23'>console</a>, env, <a href='../088file.mu.html#L11'>resources</a>
 <span id="L154" class="LineNr">154 </span>  ]
 <span id="L155" class="LineNr">155 </span>  <span class="Comment"># no change; doesn't die</span>
 <span id="L156" class="LineNr">156 </span>  screen-should-contain [
-<span id="L157" class="LineNr">157 </span>   <span class="Constant"> .                                                                                 run (F4)           .</span>
-<span id="L158" class="LineNr">158 </span>   <span class="Constant"> .                                                  ╎                                                 .</span>
-<span id="L159" class="LineNr">159 </span><span class="Constant">    .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
-<span id="L160" class="LineNr">160 </span>   <span class="Constant"> .                                                  ╎0   edit          copy            delete         .</span>
-<span id="L161" class="LineNr">161 </span>   <span class="Constant"> .                                                  ╎stash 123456789                                  .</span>
-<span id="L162" class="LineNr">162 </span>   <span class="Constant"> .                                                  ╎123456789                                        .</span>
+<span id="L157" class="LineNr">157 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                                                 run (F4)           .</span>
+<span id="L158" class="LineNr">158 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎                                                 .</span>
+<span id="L159" class="LineNr">159 </span><span class="Constant">  </span><span class="Conceal">¦</span><span class="Constant"> .╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╌╎─────────────────────────────────────────────────.</span>
+<span id="L160" class="LineNr">160 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎0   edit          copy            delete         .</span>
+<span id="L161" class="LineNr">161 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎stash 123456789                                  .</span>
+<span id="L162" class="LineNr">162 </span>  <span class="Conceal">¦</span><span class="Constant"> .                                                  ╎123456789                                        .</span>
 <span id="L163" class="LineNr">163 </span>  ]
 <span id="L164" class="LineNr">164 </span>]
 <span id="L165" class="LineNr">165 </span>
@@ -244,29 +245,29 @@ if ('onhashchange' in window) {
 <span id="L183" class="LineNr">183 </span><span class="muRecipe">after</span> <span class="Constant"><a href='004-programming-environment.mu.html#L80'>&lt;global-touch&gt;</a></span> [
 <span id="L184" class="LineNr">184 </span>  <span class="Comment"># check if it's inside the code of any sandbox</span>
 <span id="L185" class="LineNr">185 </span>  <span class="Delimiter">{</span>
-<span id="L186" class="LineNr">186 </span>    sandbox-left-margin:num <span class="Special">&lt;-</span> get *current-sandbox, <span class="Constant">left:offset</span>
-<span id="L187" class="LineNr">187 </span>    click-column:num <span class="Special">&lt;-</span> get t, <span class="Constant">column:offset</span>
-<span id="L188" class="LineNr">188 </span>    on-sandbox-side?:bool <span class="Special">&lt;-</span> greater-or-equal click-column, sandbox-left-margin
-<span id="L189" class="LineNr">189 </span>    <span class="muControl">break-unless</span> on-sandbox-side?
-<span id="L190" class="LineNr">190 </span>    first-sandbox:&amp;:sandbox <span class="Special">&lt;-</span> get *env, <span class="Constant">sandbox:offset</span>
-<span id="L191" class="LineNr">191 </span>    <span class="muControl">break-unless</span> first-sandbox
-<span id="L192" class="LineNr">192 </span>    first-sandbox-begins:num <span class="Special">&lt;-</span> get *first-sandbox, <span class="Constant">starting-row-on-screen:offset</span>
-<span id="L193" class="LineNr">193 </span>    click-row:num <span class="Special">&lt;-</span> get t, <span class="Constant">row:offset</span>
-<span id="L194" class="LineNr">194 </span>    below-sandbox-editor?:bool <span class="Special">&lt;-</span> greater-or-equal click-row, first-sandbox-begins
-<span id="L195" class="LineNr">195 </span>    <span class="muControl">break-unless</span> below-sandbox-editor?
-<span id="L196" class="LineNr">196 </span>    <span class="Comment"># identify the sandbox whose code is being clicked on</span>
-<span id="L197" class="LineNr">197 </span>    sandbox:&amp;:sandbox <span class="Special">&lt;-</span> <a href='010-sandbox-trace.mu.html#L212'>find-click-in-sandbox-code</a> env, click-row
-<span id="L198" class="LineNr">198 </span>    <span class="muControl">break-unless</span> sandbox
-<span id="L199" class="LineNr">199 </span>    <span class="Comment"># toggle its display-trace? property</span>
-<span id="L200" class="LineNr">200 </span>    x:bool <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">display-trace?:offset</span>
-<span id="L201" class="LineNr">201 </span>    x <span class="Special">&lt;-</span> not x
-<span id="L202" class="LineNr">202 </span>    *sandbox <span class="Special">&lt;-</span> put *sandbox, <span class="Constant">display-trace?:offset</span>, x
-<span id="L203" class="LineNr">203 </span>    <a href='../081print.mu.html#L623'>hide-screen</a> <a href='../081print.mu.html#L4'>screen</a>
-<span id="L204" class="LineNr">204 </span>    <a href='../081print.mu.html#L4'>screen</a> <span class="Special">&lt;-</span> render-sandbox-side <a href='../081print.mu.html#L4'>screen</a>, env, <a href='001-editor.mu.html#L123'>render</a>
-<span id="L205" class="LineNr">205 </span>    <a href='../081print.mu.html#L4'>screen</a> <span class="Special">&lt;-</span> <a href='004-programming-environment.mu.html#L511'>update-cursor</a> <a href='../081print.mu.html#L4'>screen</a>, recipes, current-sandbox, sandbox-in-focus?, env
-<span id="L206" class="LineNr">206 </span>    <span class="Comment"># no change in cursor</span>
-<span id="L207" class="LineNr">207 </span>    <a href='../081print.mu.html#L631'>show-screen</a> <a href='../081print.mu.html#L4'>screen</a>
-<span id="L208" class="LineNr">208 </span>    <span class="muControl">loop</span> <span class="Constant">+next-event</span>
+<span id="L186" class="LineNr">186 </span>  <span class="Conceal">¦</span> sandbox-left-margin:num <span class="Special">&lt;-</span> get *current-sandbox, <span class="Constant">left:offset</span>
+<span id="L187" class="LineNr">187 </span>  <span class="Conceal">¦</span> click-column:num <span class="Special">&lt;-</span> get t, <span class="Constant">column:offset</span>
+<span id="L188" class="LineNr">188 </span>  <span class="Conceal">¦</span> on-sandbox-side?:bool <span class="Special">&lt;-</span> greater-or-equal click-column, sandbox-left-margin
+<span id="L189" class="LineNr">189 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> on-sandbox-side?
+<span id="L190" class="LineNr">190 </span>  <span class="Conceal">¦</span> first-sandbox:&amp;:sandbox <span class="Special">&lt;-</span> get *env, <span class="Constant">sandbox:offset</span>
+<span id="L191" class="LineNr">191 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> first-sandbox
+<span id="L192" class="LineNr">192 </span>  <span class="Conceal">¦</span> first-sandbox-begins:num <span class="Special">&lt;-</span> get *first-sandbox, <span class="Constant">starting-row-on-screen:offset</span>
+<span id="L193" class="LineNr">193 </span>  <span class="Conceal">¦</span> click-row:num <span class="Special">&lt;-</span> get t, <span class="Constant">row:offset</span>
+<span id="L194" class="LineNr">194 </span>  <span class="Conceal">¦</span> below-sandbox-editor?:bool <span class="Special">&lt;-</span> greater-or-equal click-row, first-sandbox-begins
+<span id="L195" class="LineNr">195 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> below-sandbox-editor?
+<span id="L196" class="LineNr">196 </span>  <span class="Conceal">¦</span> <span class="Comment"># identify the sandbox whose code is being clicked on</span>
+<span id="L197" class="LineNr">197 </span>  <span class="Conceal">¦</span> sandbox:&amp;:sandbox <span class="Special">&lt;-</span> <a href='010-sandbox-trace.mu.html#L212'>find-click-in-sandbox-code</a> env, click-row
+<span id="L198" class="LineNr">198 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> sandbox
+<span id="L199" class="LineNr">199 </span>  <span class="Conceal">¦</span> <span class="Comment"># toggle its display-trace? property</span>
+<span id="L200" class="LineNr">200 </span>  <span class="Conceal">¦</span> x:bool <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">display-trace?:offset</span>
+<span id="L201" class="LineNr">201 </span>  <span class="Conceal">¦</span> x <span class="Special">&lt;-</span> not x
+<span id="L202" class="LineNr">202 </span>  <span class="Conceal">¦</span> *sandbox <span class="Special">&lt;-</span> put *sandbox, <span class="Constant">display-trace?:offset</span>, x
+<span id="L203" class="LineNr">203 </span>  <span class="Conceal">¦</span> <a href='../081print.mu.html#L623'>hide-screen</a> <a href='../081print.mu.html#L4'>screen</a>
+<span id="L204" class="LineNr">204 </span>  <span class="Conceal">¦</span> <a href='../081print.mu.html#L4'>screen</a> <span class="Special">&lt;-</span> render-sandbox-side <a href='../081print.mu.html#L4'>screen</a>, env, <a href='001-editor.mu.html#L123'>render</a>
+<span id="L205" class="LineNr">205 </span>  <span class="Conceal">¦</span> <a href='../081print.mu.html#L4'>screen</a> <span class="Special">&lt;-</span> <a href='004-programming-environment.mu.html#L511'>update-cursor</a> <a href='../081print.mu.html#L4'>screen</a>, recipes, current-sandbox, sandbox-in-focus?, env
+<span id="L206" class="LineNr">206 </span>  <span class="Conceal">¦</span> <span class="Comment"># no change in cursor</span>
+<span id="L207" class="LineNr">207 </span>  <span class="Conceal">¦</span> <a href='../081print.mu.html#L631'>show-screen</a> <a href='../081print.mu.html#L4'>screen</a>
+<span id="L208" class="LineNr">208 </span>  <span class="Conceal">¦</span> <span class="muControl">loop</span> <span class="Constant">+next-event</span>
 <span id="L209" class="LineNr">209 </span>  <span class="Delimiter">}</span>
 <span id="L210" class="LineNr">210 </span>]
 <span id="L211" class="LineNr">211 </span>
@@ -280,13 +281,13 @@ if ('onhashchange' in window) {
 <span id="L219" class="LineNr">219 </span>  assert clicked-on-sandboxes?, <span class="Constant">[extract-sandbox called on click to sandbox editor]</span>
 <span id="L220" class="LineNr">220 </span>  <span class="Comment"># while click-row &lt; sandbox.next-sandbox.starting-row-on-screen</span>
 <span id="L221" class="LineNr">221 </span>  <span class="Delimiter">{</span>
-<span id="L222" class="LineNr">222 </span>    next-sandbox:&amp;:sandbox <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">next-sandbox:offset</span>
-<span id="L223" class="LineNr">223 </span>    <span class="muControl">break-unless</span> next-sandbox
-<span id="L224" class="LineNr">224 </span>    next-start:num <span class="Special">&lt;-</span> get *next-sandbox, <span class="Constant">starting-row-on-screen:offset</span>
-<span id="L225" class="LineNr">225 </span>    found?:bool <span class="Special">&lt;-</span> lesser-than click-row, next-start
-<span id="L226" class="LineNr">226 </span>    <span class="muControl">break-if</span> found?
-<span id="L227" class="LineNr">227 </span>    sandbox <span class="Special">&lt;-</span> copy next-sandbox
-<span id="L228" class="LineNr">228 </span>    <span class="muControl">loop</span>
+<span id="L222" class="LineNr">222 </span>  <span class="Conceal">¦</span> next-sandbox:&amp;:sandbox <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">next-sandbox:offset</span>
+<span id="L223" class="LineNr">223 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> next-sandbox
+<span id="L224" class="LineNr">224 </span>  <span class="Conceal">¦</span> next-start:num <span class="Special">&lt;-</span> get *next-sandbox, <span class="Constant">starting-row-on-screen:offset</span>
+<span id="L225" class="LineNr">225 </span>  <span class="Conceal">¦</span> found?:bool <span class="Special">&lt;-</span> lesser-than click-row, next-start
+<span id="L226" class="LineNr">226 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> found?
+<span id="L227" class="LineNr">227 </span>  <span class="Conceal">¦</span> sandbox <span class="Special">&lt;-</span> copy next-sandbox
+<span id="L228" class="LineNr">228 </span>  <span class="Conceal">¦</span> <span class="muControl">loop</span>
 <span id="L229" class="LineNr">229 </span>  <span class="Delimiter">}</span>
 <span id="L230" class="LineNr">230 </span>  <span class="Comment"># return sandbox if click is in its code region</span>
 <span id="L231" class="LineNr">231 </span>  code-ending-row:num <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">code-ending-row-on-screen:offset</span>
@@ -295,8 +296,8 @@ if ('onhashchange' in window) {
 <span id="L234" class="LineNr">234 </span>  click-below-menu?:bool <span class="Special">&lt;-</span> greater-than click-row, start
 <span id="L235" class="LineNr">235 </span>  click-on-sandbox-code?:bool <span class="Special">&lt;-</span> and click-above-response?, click-below-menu?
 <span id="L236" class="LineNr">236 </span>  <span class="Delimiter">{</span>
-<span id="L237" class="LineNr">237 </span>    <span class="muControl">break-if</span> click-on-sandbox-code?
-<span id="L238" class="LineNr">238 </span>    <span class="muControl">return</span> <span class="Constant">0/no-click-in-sandbox-output</span>
+<span id="L237" class="LineNr">237 </span>  <span class="Conceal">¦</span> <span class="muControl">break-if</span> click-on-sandbox-code?
+<span id="L238" class="LineNr">238 </span>  <span class="Conceal">¦</span> <span class="muControl">return</span> <span class="Constant">0/no-click-in-sandbox-output</span>
 <span id="L239" class="LineNr">239 </span>  <span class="Delimiter">}</span>
 <span id="L240" class="LineNr">240 </span>  <span class="muControl">return</span> sandbox
 <span id="L241" class="LineNr">241 </span>]
@@ -304,11 +305,11 @@ if ('onhashchange' in window) {
 <span id="L243" class="LineNr">243 </span><span class="Comment"># when rendering a sandbox, dump its trace before response/warning if display-trace? property is set</span>
 <span id="L244" class="LineNr">244 </span><span class="muRecipe">after</span> <span class="Constant"><a href='005-sandbox.mu.html#L283'>&lt;render-sandbox-results&gt;</a></span> [
 <span id="L245" class="LineNr">245 </span>  <span class="Delimiter">{</span>
-<span id="L246" class="LineNr">246 </span>    display-trace?:bool <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">display-trace?:offset</span>
-<span id="L247" class="LineNr">247 </span>    <span class="muControl">break-unless</span> display-trace?
-<span id="L248" class="LineNr">248 </span>    sandbox-trace:text <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">trace:offset</span>
-<span id="L249" class="LineNr">249 </span>    <span class="muControl">break-unless</span> sandbox-trace  <span class="Comment"># nothing to print; move on</span>
-<span id="L250" class="LineNr">250 </span>    row, <a href='../081print.mu.html#L4'>screen</a> <span class="Special">&lt;-</span> <a href='005-sandbox.mu.html#L356'>render-text</a> <a href='../081print.mu.html#L4'>screen</a>, sandbox-trace, left, right, <span class="Constant">245/grey</span>, row
+<span id="L246" class="LineNr">246 </span>  <span class="Conceal">¦</span> display-trace?:bool <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">display-trace?:offset</span>
+<span id="L247" class="LineNr">247 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> display-trace?
+<span id="L248" class="LineNr">248 </span>  <span class="Conceal">¦</span> sandbox-trace:text <span class="Special">&lt;-</span> get *sandbox, <span class="Constant">trace:offset</span>
+<span id="L249" class="LineNr">249 </span>  <span class="Conceal">¦</span> <span class="muControl">break-unless</span> sandbox-trace  <span class="Comment"># nothing to print; move on</span>
+<span id="L250" class="LineNr">250 </span>  <span class="Conceal">¦</span> row, <a href='../081print.mu.html#L4'>screen</a> <span class="Special">&lt;-</span> <a href='005-sandbox.mu.html#L356'>render-text</a> <a href='../081print.mu.html#L4'>screen</a>, sandbox-trace, left, right, <span class="Constant">245/grey</span>, row
 <span id="L251" class="LineNr">251 </span>  <span class="Delimiter">}</span>
 <span id="L252" class="LineNr">252 </span><span class="Constant">  <a href='010-sandbox-trace.mu.html#L252'>&lt;render-sandbox-trace-done&gt;</a></span>
 <span id="L253" class="LineNr">253 </span>]