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-lua.js

@@ -40,17 +40,14 @@ var LuaHighlightRules = function() {
 
     var stdLibaries = ("string|package|os|io|math|debug|table|coroutine");
 
-    var futureReserved = "";
-
     var deprecatedIn5152 = ("setn|foreach|foreachi|gcinfo|log10|maxn");
 
     var keywordMapper = this.createKeywordMapper({
         "keyword": keywords,
         "support.function": functions,
-        "invalid.deprecated": deprecatedIn5152,
+        "keyword.deprecated": deprecatedIn5152,
         "constant.library": stdLibaries,
         "constant.language": builtinConstants,
-        "invalid.illegal": futureReserved,
         "variable.language": "self"
     }, "identifier");
 
@@ -99,7 +96,7 @@ var LuaHighlightRules = function() {
             stateName: "bracketedString",
             onMatch : function(value, currentState, stack){
                 stack.unshift(this.next, value.length, currentState);
-                return "comment";
+                return "string.start";
             },
             regex : /\[=*\[/,
             next  : [
@@ -112,13 +109,13 @@ var LuaHighlightRules = function() {
                         } else {
                             this.next = "";
                         }
-                        return "comment";
+                        return "string.end";
                     },
                     
                     regex : /\]=*\]/,
                     next  : "start"
                 }, {
-                    defaultToken : "comment"
+                    defaultToken : "string"
                 }
             ]
         },
@@ -153,7 +150,7 @@ var LuaHighlightRules = function() {
     };
     
     this.normalizeRules();
-}
+};
 
 oop.inherits(LuaHighlightRules, TextHighlightRules);
 
@@ -308,6 +305,7 @@ var Mode = function() {
     this.HighlightRules = LuaHighlightRules;
     
     this.foldingRules = new LuaFoldMode();
+    this.$behaviour = this.$defaultBehaviour;
 };
 oop.inherits(Mode, TextMode);
 
@@ -398,7 +396,7 @@ oop.inherits(Mode, TextMode);
         var tabLength = session.getTabString().length;
         var expectedIndent = prevIndent + tabLength * getNetIndentLevel(prevTokens);
         var curIndent = this.$getIndent(session.getLine(row)).length;
-        if (curIndent < expectedIndent) {
+        if (curIndent <= expectedIndent) {
             return;
         }
         session.outdentRows(new Range(row, 0, row + 2, 0));