[closebrackets addon] Give matching-brace deletion an origin

Issue #3733

addon/edit/closebrackets.js

@@ -63,7 +63,7 @@
     }
     for (var i = ranges.length - 1; i >= 0; i--) {
       var cur = ranges[i].head;
-      cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1));
+      cm.replaceRange("", Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1), "+delete");
     }
   }