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-ocaml.js

@@ -279,12 +279,11 @@ var OcamlHighlightRules = function() {
         "comment" : [
             {
                 token : "comment", // closing comment
-                regex : ".*?\\*\\)",
+                regex : "\\*\\)",
                 next : "start"
             },
             {
-                token : "comment", // comment spanning whole line
-                regex : ".+"
+                defaultToken : "comment"
             }
         ],
 
@@ -357,6 +356,7 @@ var Range = require("../range").Range;
 
 var Mode = function() {
     this.HighlightRules = OcamlHighlightRules;
+    this.$behaviour = this.$defaultBehaviour;
     
     this.$outdent   = new MatchingBraceOutdent();
 };