[closebrackets addon] Don't skip over quotes at the start of a string

Closes #4287

Author: marijnh

addon/edit/closebrackets.js

@@ -116,7 +116,9 @@
       if (opening && !range.empty()) {
         curType = "surround";
       } else if ((identical || !opening) && next == ch) {
-        if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
+        if (identical && stringStartsAfter(cm, cur))
+          curType = "both";
+        else if (triples.indexOf(ch) >= 0 && cm.getRange(cur, Pos(cur.line, cur.ch + 3)) == ch + ch + ch)
           curType = "skipThree";
         else
           curType = "skip";
@@ -192,4 +194,9 @@
       stream.start = stream.pos;
     }
   }
+
+  function stringStartsAfter(cm, pos) {
+    var token = cm.getTokenAt(Pos(pos.line, pos.ch + 1))
+    return /\bstring/.test(token.type) && token.start == pos.ch
+  }
 });