fixed groups with _ret

src/diagram.typ

@@ -46,7 +46,6 @@
   while i < elmts.len() {
     let elmt = elmts.at(i)
     if elmt.type == "grp" {
-      let grp-elmts = elmt.elmts
       elmt.elmts = elmt.elmts.map(e => {
         if e.type == "seq" {
           if e.p1 == "?" {
@@ -60,12 +59,17 @@
       elmts.at(i) = elmt
       elmts = (
         elmts.slice(0, i + 1) +
-        grp-elmts +
+        elmt.elmts +
         ((
-          type: "grp-end"
+          type: "grp-end",
+          start-i: i
         ),) +
         elmts.slice(i+1)
       )
+    } else if elmt.type == "grp-end" {
+      // Put back elements in group because they might have changed
+      elmts.at(elmt.start-i).elmts = elmts.slice(elmt.start-i + 1, i)
+
     } else if elmt.type == "seq" {
       if elmt.enable-dst {
         activation-history.push(elmt)

src/utils.typ

@@ -36,6 +36,9 @@
       max-i = calc.max(max-i, i1)
     }
   }
+  if max-i < min-i {
+    (min-i, max-i) = (max-i, min-i)
+  }
   return (min-i, max-i)
 }