fix whitespace

browser/base/content/browser-sets.inc

@@ -88,6 +88,7 @@
 
     <command id="cmd_handleBackspace" oncommand="BrowserHandleBackspace();" />
     <command id="cmd_handleShiftBackspace" oncommand="BrowserHandleShiftBackspace();" />
+
     <command id="cmd_newNavigatorTab" oncommand="BrowserOpenTab();"/>
     <command id="Browser:OpenFile"  oncommand="BrowserOpenFileWindow();"/>
     <command id="Browser:SavePage" oncommand="saveDocument(window.content.document);"/>