Added wikitext for m- and n-dashes

core/modules/parsers/newwikitextparser/rules/dash.js

@@ -0,0 +1,28 @@
+/*\
+title: $:/core/modules/parsers/newwikitextparser/rules/dash.js
+type: application/javascript
+module-type: wikitextrule
+
+Wiki text run rule for HTML entities
+
+\*/
+(function(){
+
+/*jslint node: true, browser: true */
+/*global $tw: false */
+"use strict";
+
+exports.name = "dash";
+
+exports.runParser = true;
+
+exports.regExpString = "-{2,3}(?=\\s)";
+
+exports.parse = function(match,isBlock) {
+	this.pos = match.index + match[0].length;
+	match = /(-{2,3})/mg.exec(match[0]);
+	var dash = match[0].length === 2 ? "–" : "—";
+	return [$tw.Tree.Entity(dash)];
+};
+
+})();