Update ACE Editor to version 1.2.9

The new ACE editor introduces full support for emojis (and, thereby, UTF-16 characters with high- and low-surrogates). Hence, we can remove our custom fix.

Further, this update will allow emojis to be used in pair programming sessions.

vendor/assets/javascripts/ace/mode-batchfile.js

@@ -43,14 +43,14 @@ var BatchFileHighlightRules = function() {
          { token: 'constant.numeric', regex: '%%\\w+|%[*\\d]|%\\w+%'},
          { token: 'constant.numeric', regex: '%~\\d+'},
          { token: ['markup.list', 'constant.other', 'markup.list'],
-            regex: '(%)(\\w+)(%?)' }]}
+            regex: '(%)(\\w+)(%?)' }]};
     
     this.normalizeRules();
 };
 
 BatchFileHighlightRules.metaData = { name: 'Batch File',
       scopeName: 'source.dosbatch',
-      fileTypes: [ 'bat' ] }
+      fileTypes: [ 'bat' ] };
 
 
 oop.inherits(BatchFileHighlightRules, TextHighlightRules);
@@ -79,8 +79,8 @@ oop.inherits(FoldMode, BaseFoldMode);
 
 (function() {
     
-    this.foldingStartMarker = /(\{|\[)[^\}\]]*$|^\s*(\/\*)/;
-    this.foldingStopMarker = /^[^\[\{]*(\}|\])|^[\s\*]*(\*\/)/;
+    this.foldingStartMarker = /([\{\[\(])[^\}\]\)]*$|^\s*(\/\*)/;
+    this.foldingStopMarker = /^[^\[\{\(]*([\}\]\)])|^[\s\*]*(\*\/)/;
     this.singleLineBlockCommentRe= /^\s*(\/\*).*\*\/\s*$/;
     this.tripleStarBlockCommentRe = /^\s*(\/\*\*\*).*\*\/\s*$/;
     this.startRegionRe = /^\s*(\/\*|\/\/)#?region\b/;
@@ -209,6 +209,7 @@ var FoldMode = require("./folding/cstyle").FoldMode;
 var Mode = function() {
     this.HighlightRules = BatchFileHighlightRules;
     this.foldingRules = new FoldMode();
+    this.$behaviour = this.$defaultBehaviour;
 };
 oop.inherits(Mode, TextMode);