diff -r 346c88efed21 -r 5e2f62d02dcd wp/wp-includes/js/tinymce/plugins/hr/plugin.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/js/tinymce/plugins/hr/plugin.js	Tue Jun 09 03:35:32 2015 +0200
@@ -0,0 +1,30 @@
+/**
+ * plugin.js
+ *
+ * Copyright, Moxiecode Systems AB
+ * Released under LGPL License.
+ *
+ * License: http://www.tinymce.com/license
+ * Contributing: http://www.tinymce.com/contributing
+ */
+
+/*global tinymce:true */
+
+tinymce.PluginManager.add('hr', function(editor) {
+	editor.addCommand('InsertHorizontalRule', function() {
+		editor.execCommand('mceInsertContent', false, '<hr />');
+	});
+
+	editor.addButton('hr', {
+		icon: 'hr',
+		tooltip: 'Horizontal line',
+		cmd: 'InsertHorizontalRule'
+	});
+
+	editor.addMenuItem('hr', {
+		icon: 'hr',
+		text: 'Horizontal line',
+		cmd: 'InsertHorizontalRule',
+		context: 'insert'
+	});
+});