lab14: format stuff

lab14/typed-semantics.typ

@@ -26,6 +26,8 @@ First, write the evaluation order rules (using small-step semantics) for the exp
 Next, define the typing rules for these expressions. Be sure that your typing rules guarantee both progress and preservation. (For ways of formally guaranteeing these properties, see Chapter 8 of Ben Pierce's "Types and Programming Languages").
 */
 
+#set page(columns: 2)
+
 // Language keywords rendered in monospace
 #let kw(body) = text(font: "DejaVu Sans Mono", size: 0.85em, body)
 
@@ -56,23 +58,20 @@ Next, define the typing rules for these expressions. Be sure that your typing ru
 // Rule: fraction with name on the left
 // premises (content), conclusion (content)
 #let rule(name, premises, conclusion) = {
-  grid(
-    columns: (auto, auto),
-    column-gutter: 1em,
-    align: (right + horizon, left + horizon),
+  stack(
+    dir: ttb,
+    spacing: 0.4em,
     rel(name),
     box(stroke: 0.5pt, inset: 4pt, math.equation(
       block: true,
       numbering: none,
-      // if premises != "" {
       math.frac(premises, conclusion),
-      // } else { conclusion },
     )),
   )
-  v(0.4em)
+  v(0.8em)
 }
 
-== Operational Semantics Rules
+= Evaluation Rules
 
 #v(0.6em)
 
@@ -102,7 +101,8 @@ Next, define the typing rules for these expressions. Be sure that your typing ru
 #rule("E-StrLen-Zero", "", $#sstep[#strlen[`""`]][0]$)
 #rule("E-StrLen-NonZero", [c is a single char, $s = c + s'$], $#sstep[#strlen[$s$]][#suc[#strlen[$s'$]]]$)
 
-== Typing Rules
+#pagebreak()
+= Typing Rules
 
 #v(0.6em)