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/snippets/javascript.js

@@ -103,6 +103,10 @@ snippet has\n\
 	hasOwnProperty(${1})\n\
 # docstring\n\
 snippet /**\n\
+	/**\n\
+	 * ${1:description}\n\
+	 *\n\
+	 */\n\
 snippet @par\n\
 regex /^\\s*\\*\\s*/@(para?m?)?/\n\
 	@param {${1:type}} ${2:name} ${3:description}\n\
@@ -126,12 +130,21 @@ snippet sdf\n\
 # singleton\n\
 snippet sing\n\
 	function ${1:Singleton} (${2:argument}) {\n\
+		// the cached instance\n\
 		var instance;\n\
+\n\
+		// rewrite the constructor\n\
 		$1 = function $1($2) {\n\
 			return instance;\n\
 		};\n\
+		\n\
+		// carry over the prototype properties\n\
 		$1.prototype = this;\n\
+\n\
+		// the instance\n\
 		instance = new $1();\n\
+\n\
+		// reset the constructor pointer\n\
 		instance.constructor = $1;\n\
 \n\
 		${3:// code ...}\n\