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-asciidoc.js

@@ -120,7 +120,7 @@ var AsciidocHighlightRules = function() {
         "innerTableBlock": [
             {token: "tableBlock", regex: /^\s*!={3,}\s*$/, next: "tableBlock"},
             {token: "tableBlock", regex: /^\s*|={3,}\s*$/, next: "dissallowDelimitedBlock"},
-            {token: "tableBlock", regex: /\!/}
+            {token: "tableBlock", regex: /!/}
         ],
         "macros": [
             {token: "macro", regex: /{[\w\-$]+}/},
@@ -210,7 +210,7 @@ oop.inherits(FoldMode, BaseFoldMode);
     this.getFoldWidget = function(session, foldStyle, row) {
         var line = session.getLine(row);
         if (!this.foldingStartMarker.test(line))
-            return ""
+            return "";
 
         if (line[0] == "=") {
             if (this.singleLineHeadingRe.test(line))