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Diffstat (limited to 'html/065duplex_list.mu.html')
-rw-r--r--html/065duplex_list.mu.html588
1 files changed, 294 insertions, 294 deletions
diff --git a/html/065duplex_list.mu.html b/html/065duplex_list.mu.html
index af84549a..ce239cde 100644
--- a/html/065duplex_list.mu.html
+++ b/html/065duplex_list.mu.html
@@ -44,11 +44,11 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muRecipe">def</span> push x:_elem, in:&amp;:duplex-list:_elem<span class="muRecipe"> -&gt; </span>in:&amp;:duplex-list:_elem [
   <span class="Constant">local-scope</span>
   <span class="Constant">load-ingredients</span>
-  result:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>new <span class="Delimiter">{</span>(duplex-list _elem): type<span class="Delimiter">}</span>
-  *result<span class="Special"> &lt;- </span>merge x, in, <span class="Constant">0</span>
+  result:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> new <span class="Delimiter">{</span>(duplex-list _elem): type<span class="Delimiter">}</span>
+  *result <span class="Special">&lt;-</span> merge x, in,<span class="Constant"> 0</span>
   <span class="Delimiter">{</span>
     <span class="muControl">break-unless</span> in
-    *in<span class="Special"> &lt;- </span>put *in, <span class="Constant">prev:offset</span>, result
+    *in <span class="Special">&lt;-</span> put *in, <span class="Constant">prev:offset</span>, result
   <span class="Delimiter">}</span>
   <span class="muControl">return</span> result  <span class="Comment"># needed explicitly because we need to replace 'in' with 'result'</span>
 ]
@@ -56,22 +56,22 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muRecipe">def</span> first in:&amp;:duplex-list:_elem<span class="muRecipe"> -&gt; </span>result:_elem [
   <span class="Constant">local-scope</span>
   <span class="Constant">load-ingredients</span>
-  <span class="muControl">return-unless</span> in, <span class="Constant">0</span>
-  result<span class="Special"> &lt;- </span>get *in, <span class="Constant">value:offset</span>
+  <span class="muControl">return-unless</span> in,<span class="Constant"> 0</span>
+  result <span class="Special">&lt;-</span> get *in, <span class="Constant">value:offset</span>
 ]
 
 <span class="muRecipe">def</span> next in:&amp;:duplex-list:_elem<span class="muRecipe"> -&gt; </span>result:&amp;:duplex-list:_elem/contained-in:in [
   <span class="Constant">local-scope</span>
   <span class="Constant">load-ingredients</span>
-  <span class="muControl">return-unless</span> in, <span class="Constant">0</span>
-  result<span class="Special"> &lt;- </span>get *in, <span class="Constant">next:offset</span>
+  <span class="muControl">return-unless</span> in,<span class="Constant"> 0</span>
+  result <span class="Special">&lt;-</span> get *in, <span class="Constant">next:offset</span>
 ]
 
 <span class="muRecipe">def</span> prev in:&amp;:duplex-list:_elem<span class="muRecipe"> -&gt; </span>result:&amp;:duplex-list:_elem/contained-in:in [
   <span class="Constant">local-scope</span>
   <span class="Constant">load-ingredients</span>
-  <span class="muControl">return-unless</span> in, <span class="Constant">0</span>
-  result<span class="Special"> &lt;- </span>get *in, <span class="Constant">prev:offset</span>
+  <span class="muControl">return-unless</span> in,<span class="Constant"> 0</span>
+  result <span class="Special">&lt;-</span> get *in, <span class="Constant">prev:offset</span>
   <span class="muControl">return</span> result
 ]
 
@@ -79,41 +79,41 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
   run [
     <span class="Constant">local-scope</span>
     <span class="Comment"># reserve locations 0-9 to check for missing null check</span>
-    <span class="Constant">10</span>:num/<span class="Special">raw &lt;- </span>copy <span class="Constant">34</span>
-    <span class="Constant">11</span>:num/<span class="Special">raw &lt;- </span>copy <span class="Constant">35</span>
-    list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
-    list<span class="Special"> &lt;- </span>push <span class="Constant">4</span>, list
-    list<span class="Special"> &lt;- </span>push <span class="Constant">5</span>, list
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>copy list
-    <span class="Constant">20</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">21</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">22</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">30</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next list2
-    <span class="Constant">31</span>:char/<span class="Special">raw &lt;- </span>first <span class="Constant">30</span>:&amp;:duplex-list:char/<span class="Special">raw</span>
-    <span class="Constant">32</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next <span class="Constant">30</span>:&amp;:duplex-list:char/<span class="Special">raw</span>
-    <span class="Constant">33</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>prev <span class="Constant">30</span>:&amp;:duplex-list:char/<span class="Special">raw</span>
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">40</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">41</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">50</span>:bool/<span class="Special">raw &lt;- </span>equal list, list2
+    10:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> copy<span class="Constant"> 34</span>
+    11:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> copy<span class="Constant"> 35</span>
+    list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
+    list <span class="Special">&lt;-</span> push<span class="Constant"> 4</span>, list
+    list <span class="Special">&lt;-</span> push<span class="Constant"> 5</span>, list
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> copy list
+    20:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    21:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    22:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    30:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next list2
+    31:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first 30:&amp;:duplex-list:char/<span class="Special">raw</span>
+    32:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next 30:&amp;:duplex-list:char/<span class="Special">raw</span>
+    33:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> prev 30:&amp;:duplex-list:char/<span class="Special">raw</span>
+    list2 <span class="Special">&lt;-</span> prev list2
+    40:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    41:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    50:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list, list2
   ]
   memory-should-contain [
-    <span class="Constant">0</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># no modifications to null pointers</span>
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">34</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">35</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">5</span>  <span class="Comment"># scanning next</span>
-    <span class="Constant">21</span><span class="Special"> &lt;- </span><span class="Constant">4</span>
-    <span class="Constant">22</span><span class="Special"> &lt;- </span><span class="Constant">3</span>
-    <span class="Constant">30</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># null</span>
-    <span class="Constant">31</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># first of null</span>
-    <span class="Constant">32</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># next of null</span>
-    <span class="Constant">33</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># prev of null</span>
-    <span class="Constant">40</span><span class="Special"> &lt;- </span><span class="Constant">4</span>  <span class="Comment"># then start scanning prev</span>
-    <span class="Constant">41</span><span class="Special"> &lt;- </span><span class="Constant">5</span>
-    <span class="Constant">50</span><span class="Special"> &lt;- </span><span class="Constant">1</span>  <span class="Comment"># list back at start</span>
+   <span class="Constant"> 0</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># no modifications to null pointers</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 34</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 35</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>  <span class="Comment"># scanning next</span>
+   <span class="Constant"> 21</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>
+   <span class="Constant"> 22</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>
+   <span class="Constant"> 30</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># null</span>
+   <span class="Constant"> 31</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># first of null</span>
+   <span class="Constant"> 32</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># next of null</span>
+   <span class="Constant"> 33</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># prev of null</span>
+   <span class="Constant"> 40</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>  <span class="Comment"># then start scanning prev</span>
+   <span class="Constant"> 41</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>
+   <span class="Constant"> 50</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># list back at start</span>
   ]
 ]
 
@@ -121,125 +121,125 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muRecipe">def</span> insert x:_elem, in:&amp;:duplex-list:_elem<span class="muRecipe"> -&gt; </span>in:&amp;:duplex-list:_elem [
   <span class="Constant">local-scope</span>
   <span class="Constant">load-ingredients</span>
-  new-node:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>new <span class="Delimiter">{</span>(duplex-list _elem): type<span class="Delimiter">}</span>
-  *new-node<span class="Special"> &lt;- </span>put *new-node, <span class="Constant">value:offset</span>, x
+  new-node:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> new <span class="Delimiter">{</span>(duplex-list _elem): type<span class="Delimiter">}</span>
+  *new-node <span class="Special">&lt;-</span> put *new-node, <span class="Constant">value:offset</span>, x
   <span class="Comment"># save old next before changing it</span>
-  next-node:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>get *in, <span class="Constant">next:offset</span>
-  *in<span class="Special"> &lt;- </span>put *in, <span class="Constant">next:offset</span>, new-node
-  *new-node<span class="Special"> &lt;- </span>put *new-node, <span class="Constant">prev:offset</span>, in
-  *new-node<span class="Special"> &lt;- </span>put *new-node, <span class="Constant">next:offset</span>, next-node
+  next-node:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> get *in, <span class="Constant">next:offset</span>
+  *in <span class="Special">&lt;-</span> put *in, <span class="Constant">next:offset</span>, new-node
+  *new-node <span class="Special">&lt;-</span> put *new-node, <span class="Constant">prev:offset</span>, in
+  *new-node <span class="Special">&lt;-</span> put *new-node, <span class="Constant">next:offset</span>, next-node
   <span class="muControl">return-unless</span> next-node
-  *next-node<span class="Special"> &lt;- </span>put *next-node, <span class="Constant">prev:offset</span>, new-node
+  *next-node <span class="Special">&lt;-</span> put *next-node, <span class="Constant">prev:offset</span>, new-node
 ]
 
 <span class="muScenario">scenario</span> inserting-into-duplex-list [
   <span class="Constant">local-scope</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">4</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">5</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 4</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 5</span>, list
   run [
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list  <span class="Comment"># inside list</span>
-    list2<span class="Special"> &lt;- </span>insert <span class="Constant">6</span>, list2
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list  <span class="Comment"># inside list</span>
+    list2 <span class="Special">&lt;-</span> insert<span class="Constant"> 6</span>, list2
     <span class="Comment"># check structure like before</span>
-    list2<span class="Special"> &lt;- </span>copy list
-    <span class="Constant">10</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">12</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">13</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">20</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">21</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">22</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">30</span>:bool/<span class="Special">raw &lt;- </span>equal list, list2
+    list2 <span class="Special">&lt;-</span> copy list
+    10:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    12:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    13:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    20:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    21:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    22:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    30:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list, list2
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">5</span>  <span class="Comment"># scanning next</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">4</span>
-    <span class="Constant">12</span><span class="Special"> &lt;- </span><span class="Constant">6</span>  <span class="Comment"># inserted element</span>
-    <span class="Constant">13</span><span class="Special"> &lt;- </span><span class="Constant">3</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">6</span>  <span class="Comment"># then prev</span>
-    <span class="Constant">21</span><span class="Special"> &lt;- </span><span class="Constant">4</span>
-    <span class="Constant">22</span><span class="Special"> &lt;- </span><span class="Constant">5</span>
-    <span class="Constant">30</span><span class="Special"> &lt;- </span><span class="Constant">1</span>  <span class="Comment"># list back at start</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>  <span class="Comment"># scanning next</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>
+   <span class="Constant"> 12</span> <span class="Special">&lt;-</span><span class="Constant"> 6</span>  <span class="Comment"># inserted element</span>
+   <span class="Constant"> 13</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 6</span>  <span class="Comment"># then prev</span>
+   <span class="Constant"> 21</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>
+   <span class="Constant"> 22</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>
+   <span class="Constant"> 30</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># list back at start</span>
   ]
 ]
 
 <span class="muScenario">scenario</span> inserting-at-end-of-duplex-list [
   <span class="Constant">local-scope</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">4</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">5</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 4</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 5</span>, list
   run [
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list  <span class="Comment"># inside list</span>
-    list2<span class="Special"> &lt;- </span>next list2  <span class="Comment"># now at end of list</span>
-    list2<span class="Special"> &lt;- </span>insert <span class="Constant">6</span>, list2
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list  <span class="Comment"># inside list</span>
+    list2 <span class="Special">&lt;-</span> next list2  <span class="Comment"># now at end of list</span>
+    list2 <span class="Special">&lt;-</span> insert<span class="Constant"> 6</span>, list2
     <span class="Comment"># check structure like before</span>
-    list2<span class="Special"> &lt;- </span>copy list
-    <span class="Constant">10</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">12</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">13</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">20</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">21</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">22</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">30</span>:bool/<span class="Special">raw &lt;- </span>equal list, list2
+    list2 <span class="Special">&lt;-</span> copy list
+    10:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    12:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    13:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    20:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    21:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    22:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    30:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list, list2
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">5</span>  <span class="Comment"># scanning next</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">4</span>
-    <span class="Constant">12</span><span class="Special"> &lt;- </span><span class="Constant">3</span>
-    <span class="Constant">13</span><span class="Special"> &lt;- </span><span class="Constant">6</span>  <span class="Comment"># inserted element</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">3</span>  <span class="Comment"># then prev</span>
-    <span class="Constant">21</span><span class="Special"> &lt;- </span><span class="Constant">4</span>
-    <span class="Constant">22</span><span class="Special"> &lt;- </span><span class="Constant">5</span>
-    <span class="Constant">30</span><span class="Special"> &lt;- </span><span class="Constant">1</span>  <span class="Comment"># list back at start</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>  <span class="Comment"># scanning next</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>
+   <span class="Constant"> 12</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>
+   <span class="Constant"> 13</span> <span class="Special">&lt;-</span><span class="Constant"> 6</span>  <span class="Comment"># inserted element</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>  <span class="Comment"># then prev</span>
+   <span class="Constant"> 21</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>
+   <span class="Constant"> 22</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>
+   <span class="Constant"> 30</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># list back at start</span>
   ]
 ]
 
 <span class="muScenario">scenario</span> inserting-after-start-of-duplex-list [
   <span class="Constant">local-scope</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">4</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">5</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 4</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 5</span>, list
   run [
-    list<span class="Special"> &lt;- </span>insert <span class="Constant">6</span>, list
+    list <span class="Special">&lt;-</span> insert<span class="Constant"> 6</span>, list
     <span class="Comment"># check structure like before</span>
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>copy list
-    <span class="Constant">10</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">12</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">13</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">20</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">21</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">22</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">30</span>:bool/<span class="Special">raw &lt;- </span>equal list, list2
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> copy list
+    10:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    12:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    13:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    20:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    21:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    22:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    30:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list, list2
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">5</span>  <span class="Comment"># scanning next</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">6</span>  <span class="Comment"># inserted element</span>
-    <span class="Constant">12</span><span class="Special"> &lt;- </span><span class="Constant">4</span>
-    <span class="Constant">13</span><span class="Special"> &lt;- </span><span class="Constant">3</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">4</span>  <span class="Comment"># then prev</span>
-    <span class="Constant">21</span><span class="Special"> &lt;- </span><span class="Constant">6</span>
-    <span class="Constant">22</span><span class="Special"> &lt;- </span><span class="Constant">5</span>
-    <span class="Constant">30</span><span class="Special"> &lt;- </span><span class="Constant">1</span>  <span class="Comment"># list back at start</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>  <span class="Comment"># scanning next</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 6</span>  <span class="Comment"># inserted element</span>
+   <span class="Constant"> 12</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>
+   <span class="Constant"> 13</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>  <span class="Comment"># then prev</span>
+   <span class="Constant"> 21</span> <span class="Special">&lt;-</span><span class="Constant"> 6</span>
+   <span class="Constant"> 22</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>
+   <span class="Constant"> 30</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># list back at start</span>
   ]
 ]
 
@@ -252,20 +252,20 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
   <span class="Constant">load-ingredients</span>
   <span class="Comment"># if 'x' is null, return</span>
   <span class="muControl">return-unless</span> x
-  next-node:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>get *x, <span class="Constant">next:offset</span>
-  prev-node:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>get *x, <span class="Constant">prev:offset</span>
+  next-node:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> get *x, <span class="Constant">next:offset</span>
+  prev-node:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> get *x, <span class="Constant">prev:offset</span>
   <span class="Comment"># null x's pointers</span>
-  *x<span class="Special"> &lt;- </span>put *x, <span class="Constant">next:offset</span>, <span class="Constant">0</span>
-  *x<span class="Special"> &lt;- </span>put *x, <span class="Constant">prev:offset</span>, <span class="Constant">0</span>
+  *x <span class="Special">&lt;-</span> put *x, <span class="Constant">next:offset</span>,<span class="Constant"> 0</span>
+  *x <span class="Special">&lt;-</span> put *x, <span class="Constant">prev:offset</span>,<span class="Constant"> 0</span>
   <span class="Comment"># if next-node is not null, set its prev pointer</span>
   <span class="Delimiter">{</span>
     <span class="muControl">break-unless</span> next-node
-    *next-node<span class="Special"> &lt;- </span>put *next-node, <span class="Constant">prev:offset</span>, prev-node
+    *next-node <span class="Special">&lt;-</span> put *next-node, <span class="Constant">prev:offset</span>, prev-node
   <span class="Delimiter">}</span>
   <span class="Comment"># if prev-node is not null, set its next pointer and return</span>
   <span class="Delimiter">{</span>
     <span class="muControl">break-unless</span> prev-node
-    *prev-node<span class="Special"> &lt;- </span>put *prev-node, <span class="Constant">next:offset</span>, next-node
+    *prev-node <span class="Special">&lt;-</span> put *prev-node, <span class="Constant">next:offset</span>, next-node
     <span class="muControl">return</span>
   <span class="Delimiter">}</span>
   <span class="Comment"># if prev-node is null, then we removed the head node at 'in'</span>
@@ -275,99 +275,99 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 
 <span class="muScenario">scenario</span> removing-from-duplex-list [
   <span class="Constant">local-scope</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">4</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">5</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 4</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 5</span>, list
   run [
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list  <span class="Comment"># second element</span>
-    list<span class="Special"> &lt;- </span>remove list2, list
-    <span class="Constant">10</span>:bool/<span class="Special">raw &lt;- </span>equal list2, <span class="Constant">0</span>
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list  <span class="Comment"># second element</span>
+    list <span class="Special">&lt;-</span> remove list2, list
+    10:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list2,<span class="Constant"> 0</span>
     <span class="Comment"># check structure like before</span>
-    list2<span class="Special"> &lt;- </span>copy list
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">12</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">20</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">30</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">40</span>:bool/<span class="Special">raw &lt;- </span>equal list, list2
+    list2 <span class="Special">&lt;-</span> copy list
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    12:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    20:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    30:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    40:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list, list2
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># remove returned non-null</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">5</span>  <span class="Comment"># scanning next, skipping deleted element</span>
-    <span class="Constant">12</span><span class="Special"> &lt;- </span><span class="Constant">3</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># no more elements</span>
-    <span class="Constant">30</span><span class="Special"> &lt;- </span><span class="Constant">5</span>  <span class="Comment"># prev of final element</span>
-    <span class="Constant">40</span><span class="Special"> &lt;- </span><span class="Constant">1</span>  <span class="Comment"># list back at start</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># remove returned non-null</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>  <span class="Comment"># scanning next, skipping deleted element</span>
+   <span class="Constant"> 12</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># no more elements</span>
+   <span class="Constant"> 30</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>  <span class="Comment"># prev of final element</span>
+   <span class="Constant"> 40</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># list back at start</span>
   ]
 ]
 
 <span class="muScenario">scenario</span> removing-from-start-of-duplex-list [
   <span class="Constant">local-scope</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">4</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">5</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 4</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 5</span>, list
   run [
-    list<span class="Special"> &lt;- </span>remove list, list
+    list <span class="Special">&lt;-</span> remove list, list
     <span class="Comment"># check structure like before</span>
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>copy list
-    <span class="Constant">10</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">20</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">30</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">40</span>:bool/<span class="Special">raw &lt;- </span>equal list, list2
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> copy list
+    10:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    20:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    30:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    40:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list, list2
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">4</span>  <span class="Comment"># scanning next, skipping deleted element</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">3</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># no more elements</span>
-    <span class="Constant">30</span><span class="Special"> &lt;- </span><span class="Constant">4</span>  <span class="Comment"># prev of final element</span>
-    <span class="Constant">40</span><span class="Special"> &lt;- </span><span class="Constant">1</span>  <span class="Comment"># list back at start</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>  <span class="Comment"># scanning next, skipping deleted element</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 3</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># no more elements</span>
+   <span class="Constant"> 30</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>  <span class="Comment"># prev of final element</span>
+   <span class="Constant"> 40</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># list back at start</span>
   ]
 ]
 
 <span class="muScenario">scenario</span> removing-from-end-of-duplex-list [
   <span class="Constant">local-scope</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">4</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">5</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 4</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 5</span>, list
   run [
     <span class="Comment"># delete last element</span>
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list
-    list2<span class="Special"> &lt;- </span>next list2
-    list<span class="Special"> &lt;- </span>remove list2, list
-    <span class="Constant">10</span>:bool/<span class="Special">raw &lt;- </span>equal list2, <span class="Constant">0</span>
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list
+    list2 <span class="Special">&lt;-</span> next list2
+    list <span class="Special">&lt;-</span> remove list2, list
+    10:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list2,<span class="Constant"> 0</span>
     <span class="Comment"># check structure like before</span>
-    list2<span class="Special"> &lt;- </span>copy list
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>first list2
-    list2<span class="Special"> &lt;- </span>next list2
-    <span class="Constant">12</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">20</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next list2
-    list2<span class="Special"> &lt;- </span>prev list2
-    <span class="Constant">30</span>:char/<span class="Special">raw &lt;- </span>first list2
-    <span class="Constant">40</span>:bool/<span class="Special">raw &lt;- </span>equal list, list2
+    list2 <span class="Special">&lt;-</span> copy list
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    list2 <span class="Special">&lt;-</span> next list2
+    12:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    20:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next list2
+    list2 <span class="Special">&lt;-</span> prev list2
+    30:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> first list2
+    40:bool/<span class="Special">raw</span> <span class="Special">&lt;-</span> equal list, list2
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># remove returned non-null</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">5</span>  <span class="Comment"># scanning next, skipping deleted element</span>
-    <span class="Constant">12</span><span class="Special"> &lt;- </span><span class="Constant">4</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># no more elements</span>
-    <span class="Constant">30</span><span class="Special"> &lt;- </span><span class="Constant">5</span>  <span class="Comment"># prev of final element</span>
-    <span class="Constant">40</span><span class="Special"> &lt;- </span><span class="Constant">1</span>  <span class="Comment"># list back at start</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># remove returned non-null</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>  <span class="Comment"># scanning next, skipping deleted element</span>
+   <span class="Constant"> 12</span> <span class="Special">&lt;-</span><span class="Constant"> 4</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># no more elements</span>
+   <span class="Constant"> 30</span> <span class="Special">&lt;-</span><span class="Constant"> 5</span>  <span class="Comment"># prev of final element</span>
+   <span class="Constant"> 40</span> <span class="Special">&lt;-</span><span class="Constant"> 1</span>  <span class="Comment"># list back at start</span>
   ]
 ]
 
 <span class="muScenario">scenario</span> removing-from-singleton-duplex-list [
   <span class="Constant">local-scope</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">3</span>, <span class="Constant">0</span>
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 3</span>,<span class="Constant"> 0</span>
   run [
-    list<span class="Special"> &lt;- </span>remove list, list
-    <span class="Constant">1</span>:num/<span class="Special">raw &lt;- </span>copy list
+    list <span class="Special">&lt;-</span> remove list, list
+    1:num/<span class="Special">raw</span> <span class="Special">&lt;-</span> copy list
   ]
   memory-should-contain [
-    <span class="Constant">1</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># back to an empty list</span>
+   <span class="Constant"> 1</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># back to an empty list</span>
   ]
 ]
 
@@ -379,139 +379,139 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
 <span class="muRecipe">def</span> remove-between start:&amp;:duplex-list:_elem, end:&amp;:duplex-list:_elem/contained-in:start<span class="muRecipe"> -&gt; </span>start:&amp;:duplex-list:_elem [
   <span class="Constant">local-scope</span>
   <span class="Constant">load-ingredients</span>
-  next:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>get *start, <span class="Constant">next:offset</span>
-  nothing-to-delete?:bool<span class="Special"> &lt;- </span>equal next, end
+  next:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> get *start, <span class="Constant">next:offset</span>
+  nothing-to-delete?:bool <span class="Special">&lt;-</span> equal next, end
   <span class="muControl">return-if</span> nothing-to-delete?
   assert next, <span class="Constant">[malformed duplex list]</span>
   <span class="Comment"># start-&gt;next-&gt;prev = 0</span>
   <span class="Comment"># start-&gt;next = end</span>
-  *next<span class="Special"> &lt;- </span>put *next, <span class="Constant">prev:offset</span>, <span class="Constant">0</span>
-  *start<span class="Special"> &lt;- </span>put *start, <span class="Constant">next:offset</span>, end
+  *next <span class="Special">&lt;-</span> put *next, <span class="Constant">prev:offset</span>,<span class="Constant"> 0</span>
+  *start <span class="Special">&lt;-</span> put *start, <span class="Constant">next:offset</span>, end
   <span class="muControl">return-unless</span> end
   <span class="Comment"># end-&gt;prev-&gt;next = 0</span>
   <span class="Comment"># end-&gt;prev = start</span>
-  prev:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>get *end, <span class="Constant">prev:offset</span>
+  prev:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> get *end, <span class="Constant">prev:offset</span>
   assert prev, <span class="Constant">[malformed duplex list - 2]</span>
-  *prev<span class="Special"> &lt;- </span>put *prev, <span class="Constant">next:offset</span>, <span class="Constant">0</span>
-  *end<span class="Special"> &lt;- </span>put *end, <span class="Constant">prev:offset</span>, start
+  *prev <span class="Special">&lt;-</span> put *prev, <span class="Constant">next:offset</span>,<span class="Constant"> 0</span>
+  *end <span class="Special">&lt;-</span> put *end, <span class="Constant">prev:offset</span>, start
 ]
 
 <span class="muScenario">scenario</span> remove-range [
   <span class="Comment"># construct a duplex list with six elements [13, 14, 15, 16, 17, 18]</span>
   <span class="Constant">local-scope</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">18</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">17</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">16</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">15</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">14</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">13</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 18</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 17</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 16</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 15</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 14</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 13</span>, list
   run [
     <span class="Comment"># delete 16 onwards</span>
     <span class="Comment"># first pointer: to the third element</span>
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list
-    list2<span class="Special"> &lt;- </span>next list2
-    list2<span class="Special"> &lt;- </span>remove-between list2, <span class="Constant">0</span>
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list
+    list2 <span class="Special">&lt;-</span> next list2
+    list2 <span class="Special">&lt;-</span> remove-between list2,<span class="Constant"> 0</span>
     <span class="Comment"># now check the list</span>
-    <span class="Constant">10</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    list<span class="Special"> &lt;- </span>next list
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    list<span class="Special"> &lt;- </span>next list
-    <span class="Constant">12</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    <span class="Constant">20</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next list
+    10:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    list <span class="Special">&lt;-</span> next list
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    list <span class="Special">&lt;-</span> next list
+    12:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    20:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next list
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">13</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">14</span>
-    <span class="Constant">12</span><span class="Special"> &lt;- </span><span class="Constant">15</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">0</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 13</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 14</span>
+   <span class="Constant"> 12</span> <span class="Special">&lt;-</span><span class="Constant"> 15</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>
   ]
 ]
 
 <span class="muScenario">scenario</span> remove-range-to-final [
   <span class="Constant">local-scope</span>
   <span class="Comment"># construct a duplex list with six elements [13, 14, 15, 16, 17, 18]</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">18</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">17</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">16</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">15</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">14</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">13</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 18</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 17</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 16</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 15</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 14</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 13</span>, list
   run [
     <span class="Comment"># delete 15, 16 and 17</span>
     <span class="Comment"># start pointer: to the second element</span>
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list
     <span class="Comment"># end pointer: to the last (sixth) element</span>
-    end:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list2
-    end<span class="Special"> &lt;- </span>next end
-    end<span class="Special"> &lt;- </span>next end
-    end<span class="Special"> &lt;- </span>next end
+    end:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list2
+    end <span class="Special">&lt;-</span> next end
+    end <span class="Special">&lt;-</span> next end
+    end <span class="Special">&lt;-</span> next end
     remove-between list2, end
     <span class="Comment"># now check the list</span>
-    <span class="Constant">10</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    list<span class="Special"> &lt;- </span>next list
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    list<span class="Special"> &lt;- </span>next list
-    <span class="Constant">12</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    <span class="Constant">20</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next list
+    10:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    list <span class="Special">&lt;-</span> next list
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    list <span class="Special">&lt;-</span> next list
+    12:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    20:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next list
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">13</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">14</span>
-    <span class="Constant">12</span><span class="Special"> &lt;- </span><span class="Constant">18</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">0</span>  <span class="Comment"># no more elements</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 13</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 14</span>
+   <span class="Constant"> 12</span> <span class="Special">&lt;-</span><span class="Constant"> 18</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>  <span class="Comment"># no more elements</span>
   ]
 ]
 
 <span class="muScenario">scenario</span> remove-range-empty [
   <span class="Constant">local-scope</span>
   <span class="Comment"># construct a duplex list with three elements [13, 14, 15]</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">15</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">14</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">13</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 15</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 14</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 13</span>, list
   run [
     <span class="Comment"># delete between first and second element (i.e. nothing)</span>
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list
     remove-between list, list2
     <span class="Comment"># now check the list</span>
-    <span class="Constant">10</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    list<span class="Special"> &lt;- </span>next list
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    list<span class="Special"> &lt;- </span>next list
-    <span class="Constant">12</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    <span class="Constant">20</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next list
+    10:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    list <span class="Special">&lt;-</span> next list
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    list <span class="Special">&lt;-</span> next list
+    12:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    20:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next list
   ]
   <span class="Comment"># no change</span>
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">13</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">14</span>
-    <span class="Constant">12</span><span class="Special"> &lt;- </span><span class="Constant">15</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">0</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 13</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 14</span>
+   <span class="Constant"> 12</span> <span class="Special">&lt;-</span><span class="Constant"> 15</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>
   ]
 ]
 
 <span class="muScenario">scenario</span> remove-range-to-end [
   <span class="Constant">local-scope</span>
   <span class="Comment"># construct a duplex list with six elements [13, 14, 15, 16, 17, 18]</span>
-  list:&amp;:duplex-list:char<span class="Special"> &lt;- </span>push <span class="Constant">18</span>, <span class="Constant">0</span>
-  list<span class="Special"> &lt;- </span>push <span class="Constant">17</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">16</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">15</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">14</span>, list
-  list<span class="Special"> &lt;- </span>push <span class="Constant">13</span>, list
+  list:&amp;:duplex-list:char <span class="Special">&lt;-</span> push<span class="Constant"> 18</span>,<span class="Constant"> 0</span>
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 17</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 16</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 15</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 14</span>, list
+  list <span class="Special">&lt;-</span> push<span class="Constant"> 13</span>, list
   run [
     <span class="Comment"># remove the third element and beyond</span>
-    list2:&amp;:duplex-list:char<span class="Special"> &lt;- </span>next list
-    remove-between list2, <span class="Constant">0</span>
+    list2:&amp;:duplex-list:char <span class="Special">&lt;-</span> next list
+    remove-between list2,<span class="Constant"> 0</span>
     <span class="Comment"># now check the list</span>
-    <span class="Constant">10</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    list<span class="Special"> &lt;- </span>next list
-    <span class="Constant">11</span>:char/<span class="Special">raw &lt;- </span>get *list, <span class="Constant">value:offset</span>
-    <span class="Constant">20</span>:&amp;:duplex-list:char/<span class="Special">raw &lt;- </span>next list
+    10:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    list <span class="Special">&lt;-</span> next list
+    11:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> get *list, <span class="Constant">value:offset</span>
+    20:&amp;:duplex-list:char/<span class="Special">raw</span> <span class="Special">&lt;-</span> next list
   ]
   memory-should-contain [
-    <span class="Constant">10</span><span class="Special"> &lt;- </span><span class="Constant">13</span>
-    <span class="Constant">11</span><span class="Special"> &lt;- </span><span class="Constant">14</span>
-    <span class="Constant">20</span><span class="Special"> &lt;- </span><span class="Constant">0</span>
+   <span class="Constant"> 10</span> <span class="Special">&lt;-</span><span class="Constant"> 13</span>
+   <span class="Constant"> 11</span> <span class="Special">&lt;-</span><span class="Constant"> 14</span>
+   <span class="Constant"> 20</span> <span class="Special">&lt;-</span><span class="Constant"> 0</span>
   ]
 ]
 
@@ -521,40 +521,40 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
   <span class="Constant">load-ingredients</span>
   <span class="muControl">return-unless</span> in
   <span class="muControl">return-unless</span> start
-  end:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>copy start
+  end:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> copy start
   <span class="Delimiter">{</span>
-    next:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>next end/insert-range
+    next:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> next end/insert-range
     <span class="muControl">break-unless</span> next
-    end<span class="Special"> &lt;- </span>copy next
+    end <span class="Special">&lt;-</span> copy next
     <span class="muControl">loop</span>
   <span class="Delimiter">}</span>
-  next:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>next in
-  *end<span class="Special"> &lt;- </span>put *end, <span class="Constant">next:offset</span>, next
+  next:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> next in
+  *end <span class="Special">&lt;-</span> put *end, <span class="Constant">next:offset</span>, next
   <span class="Delimiter">{</span>
     <span class="muControl">break-unless</span> next
-    *next<span class="Special"> &lt;- </span>put *next, <span class="Constant">prev:offset</span>, end
+    *next <span class="Special">&lt;-</span> put *next, <span class="Constant">prev:offset</span>, end
   <span class="Delimiter">}</span>
-  *in<span class="Special"> &lt;- </span>put *in, <span class="Constant">next:offset</span>, start
-  *start<span class="Special"> &lt;- </span>put *start, <span class="Constant">prev:offset</span>, in
+  *in <span class="Special">&lt;-</span> put *in, <span class="Constant">next:offset</span>, start
+  *start <span class="Special">&lt;-</span> put *start, <span class="Constant">prev:offset</span>, in
 ]
 
 <span class="muRecipe">def</span> append in:&amp;:duplex-list:_elem, new:&amp;:duplex-list:_elem/contained-in:in<span class="muRecipe"> -&gt; </span>in:&amp;:duplex-list:_elem [
   <span class="Constant">local-scope</span>
   <span class="Constant">load-ingredients</span>
-  last:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>last in
-  *last<span class="Special"> &lt;- </span>put *last, <span class="Constant">next:offset</span>, new
+  last:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> last in
+  *last <span class="Special">&lt;-</span> put *last, <span class="Constant">next:offset</span>, new
   <span class="muControl">return-unless</span> new
-  *new<span class="Special"> &lt;- </span>put *new, <span class="Constant">prev:offset</span>, last
+  *new <span class="Special">&lt;-</span> put *new, <span class="Constant">prev:offset</span>, last
 ]
 
 <span class="muRecipe">def</span> last in:&amp;:duplex-list:_elem<span class="muRecipe"> -&gt; </span>result:&amp;:duplex-list:_elem [
   <span class="Constant">local-scope</span>
   <span class="Constant">load-ingredients</span>
-  result<span class="Special"> &lt;- </span>copy in
+  result <span class="Special">&lt;-</span> copy in
   <span class="Delimiter">{</span>
-    next:&amp;:duplex-list:_elem<span class="Special"> &lt;- </span>next result
+    next:&amp;:duplex-list:_elem <span class="Special">&lt;-</span> next result
     <span class="muControl">break-unless</span> next
-    result<span class="Special"> &lt;- </span>copy next
+    result <span class="Special">&lt;-</span> copy next
     <span class="muControl">loop</span>
   <span class="Delimiter">}</span>
 ]
@@ -566,11 +566,11 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color
   $print x, <span class="Constant">[: ]</span>
   <span class="Delimiter">{</span>
     <span class="muControl">break-unless</span> x
-    c:_elem<span class="Special"> &lt;- </span>get *x, <span class="Constant">value:offset</span>
+    c:_elem <span class="Special">&lt;-</span> get *x, <span class="Constant">value:offset</span>
     $print c, <span class="Constant">[ ]</span>
-    x<span class="Special"> &lt;- </span>next x
+    x <span class="Special">&lt;-</span> next x
     <span class="Delimiter">{</span>
-      is-newline?:bool<span class="Special"> &lt;- </span>equal c, <span class="Constant">10/newline</span>
+      is-newline?:bool <span class="Special">&lt;-</span> equal c, <span class="Constant">10/newline</span>
       <span class="muControl">break-unless</span> is-newline?
       $print <span class="Constant">10/newline</span>
       $print x, <span class="Constant">[: ]</span>