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-tcl.js

@@ -19,8 +19,8 @@ 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/;
@@ -161,7 +161,7 @@ var TclHighlightRules = function() {
                 next  : "splitlineStart"
             }, {
                 token : "text",
-                regex : '[\\\\](?:["]|[{]|[}]|[[]|[]]|[$]|[\])'
+                regex : /\\(?:["{}\[\]$\\])/
             }, {
                 token : "text", // last value before command
                 regex : '^|[^{][;][^}]|[/\r/]',
@@ -333,6 +333,7 @@ var Mode = function() {
     this.HighlightRules = TclHighlightRules;
     this.$outdent = new MatchingBraceOutdent();
     this.foldingRules = new CStyleFoldMode();
+    this.$behaviour = this.$defaultBehaviour;
 };
 oop.inherits(Mode, TextMode);