fix minor bug in Cursor.matchPair fuunction; depending on chr at strIdx, we might want to iterate on the leftStrings or on the rightStrings. Before, we iterated on the rightStrings only, but now we iterate on whichever is appropriate

fcore/cursor.sml

@@ -1611,7 +1611,7 @@ struct
         if strPos < 0 then
           case stl of
             hd :: tl =>
-              helpMatchPairNext
+              helpMatchPairPrev
                 ( String.size hd - 1, hd, absIdx, tl, origIdx
                 , openChr, openNum, closeChr, closeNum
                 )
@@ -1632,53 +1632,49 @@ struct
                 )
           end
 
-  fun startMatchPair (strIdx, shd, stl, cursorIdx) =
-    let
-      val chr = String.sub (shd, strIdx)
-    in
-      (case chr of
+  fun startMatchPair (strIdx, shd, leftStrings, rightStrings, cursorIdx) =
+    case String.sub (shd, strIdx) of
       #"(" =>
        helpMatchPairNext
-            ( strIdx + 1, shd, cursorIdx + 1, stl, cursorIdx
+         ( strIdx + 1, shd, cursorIdx + 1, rightStrings, cursorIdx
          , #"(", 1, #")", 0
          )
     | #")" =>
        helpMatchPairPrev
-            ( strIdx - 1, shd, cursorIdx - 1, stl, cursorIdx
+         ( strIdx - 1, shd, cursorIdx - 1, leftStrings, cursorIdx
          , #"(", 0, #")", 1
          )
     | #"[" =>
        helpMatchPairNext
-            ( strIdx + 1, shd, cursorIdx + 1, stl, cursorIdx
+         ( strIdx + 1, shd, cursorIdx + 1, rightStrings, cursorIdx
          , #"[", 1, #"]", 0
          )
     | #"]" =>
        helpMatchPairPrev
-            ( strIdx - 1, shd, cursorIdx - 1, stl, cursorIdx
+         ( strIdx - 1, shd, cursorIdx - 1, leftStrings, cursorIdx
          , #"[", 0, #"]", 1
          )
     | #"{" =>
        helpMatchPairNext
-            ( strIdx + 1, shd, cursorIdx + 1, stl, cursorIdx
+         ( strIdx + 1, shd, cursorIdx + 1, rightStrings, cursorIdx
          , #"{", 1, #"}", 0
          )
     | #"}" =>
        helpMatchPairPrev
-            ( strIdx - 1, shd, cursorIdx - 1, stl, cursorIdx
+         ( strIdx - 1, shd, cursorIdx - 1, leftStrings, cursorIdx
          , #"{", 0, #"}", 1
          )
     | #"<" =>
        helpMatchPairNext
-            ( strIdx + 1, shd, cursorIdx + 1, stl, cursorIdx
+         ( strIdx + 1, shd, cursorIdx + 1, rightStrings, cursorIdx
          , #"<", 1, #">", 0
          )
     | #">" =>
        helpMatchPairPrev
-            ( strIdx - 1, shd, cursorIdx - 1, stl, cursorIdx
+         ( strIdx - 1, shd, cursorIdx - 1, leftStrings, cursorIdx
          , #"<", 0, #">", 1
          )
-       | _ => cursorIdx)
-    end
+    | _ => cursorIdx
 
   fun matchPair (lineGap: LineGap.t, cursorIdx) =
     let
@@ -1692,7 +1688,7 @@ struct
           in
             if strIdx < String.size shd then
               (* strIdx is in this string *)
-              startMatchPair (strIdx, shd, stl, cursorIdx)
+              startMatchPair (strIdx, shd, leftStrings, stl, cursorIdx)
             else
               (* strIdx is in tl *)
               (case stl of
@@ -1701,7 +1697,7 @@ struct
                      val strIdx = strIdx - String.size shd
                      val leftStrings = shd :: leftStrings
                    in 
-                      startMatchPair (strIdx, stlhd, leftStrings, cursorIdx)
+                      startMatchPair (strIdx, stlhd, leftStrings, stltl, cursorIdx)
                    end
                | [] => cursorIdx)
           end