Menus: Remove whitespace between nav menu items.

Avoids CSS hacks like floating menu items or setting the parent element's
font-size to 0 in order to display nav menus horizontally.

Props jjeaton.
Fixes #27762.


Built from https://develop.svn.wordpress.org/trunk@34321


git-svn-id: http://core.svn.wordpress.org/trunk@34285 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/nav-menu-template.php

@@ -185,7 +185,7 @@ class Walker_Nav_Menu extends Walker {
 	 * @param array  $args   An array of arguments. @see wp_nav_menu()
 	 */
 	public function end_el( &$output, $item, $depth = 0, $args = array() ) {
-		$output .= "</li>\n";
+		$output .= '</li>';
 	}
 
 } // Walker_Nav_Menu