Index: admin-header.php
===================================================================
--- admin-header.php	(revision 46888)
+++ admin-header.php	(working copy)
@@ -44,7 +44,7 @@
 	$admin_title = get_bloginfo( 'name' );
 }
 
-if ( $admin_title == $title ) {
+if ( $admin_title === $title ) {
 	/* translators: Admin screen title. %s: Admin screen name. */
 	$admin_title = sprintf( __( '%s — WordPress' ), $title );
 } else {
@@ -148,7 +148,7 @@
  */
 do_action( 'admin_head' );
 
-if ( get_user_setting( 'mfold' ) == 'f' ) {
+if ( 'f' === get_user_setting( 'mfold' ) ) {
 	$admin_body_class .= ' folded';
 }
 
@@ -288,6 +288,6 @@
  */
 do_action( 'all_admin_notices' );
 
-if ( $parent_file == 'options-general.php' ) {
+if ( 'options-general.php' === $parent_file ) {
 	require( ABSPATH . 'wp-admin/options-head.php' );
 }