tinymce-editor/copy_this/modules/hdi/hdi-tinymce/tinymce/plugins/hr/plugin.min.js

tinymce.PluginManager.add("hr",function(n){n.addCommand("InsertHorizontalRule",function(){n.execCommand("mceInsertContent",!1,"<hr />")}),n.addButton("hr",{icon:"hr",tooltip:"Horizontal line",cmd:"InsertHorizontalRule"}),n.addMenuItem("hr",{icon:"hr",text:"Horizontal line",cmd:"InsertHorizontalRule",context:"insert"})});