fix: Change curly braces insertion behavior for Markdown to act the s…

…ame as for other braces (#4994)

src/mode/markdown.js

@@ -1,10 +1,8 @@
 "use strict";
 
 var oop = require("../lib/oop");
+var CstyleBehaviour = require("./behaviour/cstyle").CstyleBehaviour;
 var TextMode = require("./text").Mode;
-var JavaScriptMode = require("./javascript").Mode;
-var XmlMode = require("./xml").Mode;
-var HtmlMode = require("./html").Mode;
 var MarkdownHighlightRules = require("./markdown_highlight_rules").MarkdownHighlightRules;
 var MarkdownFoldMode = require("./folding/markdown").FoldMode;
 
@@ -21,7 +19,7 @@ var Mode = function() {
     });
 
     this.foldingRules = new MarkdownFoldMode();
-    this.$behaviour = this.$defaultBehaviour;
+    this.$behaviour = new CstyleBehaviour({ braces: true });
 };
 oop.inherits(Mode, TextMode);