--- a/wp/wp-admin/admin-header.php	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-admin/admin-header.php	Mon Oct 14 17:39:30 2019 +0200
@@ -10,8 +10,19 @@
 if ( ! defined( 'WP_ADMIN' ) )
 	require_once( dirname( __FILE__ ) . '/admin.php' );
 
-// In case admin-header.php is included in a function.
-global $title, $hook_suffix, $current_screen, $wp_locale, $pagenow, $wp_version,
+/**
+ * In case admin-header.php is included in a function.
+ *
+ * @global string    $title
+ * @global string    $hook_suffix
+ * @global WP_Screen $current_screen
+ * @global WP_Locale $wp_locale
+ * @global string    $pagenow
+ * @global string    $update_title
+ * @global int       $total_update_count
+ * @global string    $parent_file
+ */
+global $title, $hook_suffix, $current_screen, $wp_locale, $pagenow,
 	$update_title, $total_update_count, $parent_file;
 
 // Catch plugins that include admin-header.php before admin.php completes.
@@ -21,20 +32,26 @@
 get_admin_page_title();
 $title = esc_html( strip_tags( $title ) );
 
-if ( is_network_admin() )
-	$admin_title = sprintf( __( 'Network Admin: %s' ), esc_html( get_current_site()->site_name ) );
-elseif ( is_user_admin() )
-	$admin_title = sprintf( __( 'Global Dashboard: %s' ), esc_html( get_current_site()->site_name ) );
-else
+if ( is_network_admin() ) {
+	/* translators: Network admin screen title. 1: Network name */
+	$admin_title = sprintf( __( 'Network Admin: %s' ), esc_html( get_network()->site_name ) );
+} elseif ( is_user_admin() ) {
+	/* translators: User dashboard screen title. 1: Network name */
+	$admin_title = sprintf( __( 'User Dashboard: %s' ), esc_html( get_network()->site_name ) );
+} else {
 	$admin_title = get_bloginfo( 'name' );
+}
 
-if ( $admin_title == $title )
+if ( $admin_title == $title ) {
+	/* translators: Admin screen title. 1: Admin screen name */
 	$admin_title = sprintf( __( '%1$s — WordPress' ), $title );
-else
+} else {
+	/* translators: Admin screen title. 1: Admin screen name, 2: Network or site name */
 	$admin_title = sprintf( __( '%1$s ‹ %2$s — WordPress' ), $title, $admin_title );
+}
 
 /**
- * Filter the title tag content for an admin page.
+ * Filters the title tag content for an admin page.
  *
  * @since 3.1.0
  *
@@ -84,7 +101,7 @@
  *
  * @since 2.6.0
  */
-do_action( "admin_print_styles-$hook_suffix" );
+do_action( "admin_print_styles-{$hook_suffix}" );
 
 /**
  * Fires when styles are printed for all admin pages.
@@ -98,7 +115,7 @@
  *
  * @since 2.1.0
  */
-do_action( "admin_print_scripts-$hook_suffix" );
+do_action( "admin_print_scripts-{$hook_suffix}" );
 
 /**
  * Fires when scripts are printed for all admin pages.
@@ -115,7 +132,7 @@
  *
  * @since 2.1.0
  */
-do_action( "admin_head-$hook_suffix" );
+do_action( "admin_head-{$hook_suffix}" );
 
 /**
  * Fires in head section for all admin pages.
@@ -142,10 +159,10 @@
 if ( $current_screen->taxonomy )
 	$admin_body_class .= ' taxonomy-' . $current_screen->taxonomy;
 
-$admin_body_class .= ' branch-' . str_replace( array( '.', ',' ), '-', floatval( $wp_version ) );
-$admin_body_class .= ' version-' . str_replace( '.', '-', preg_replace( '/^([.0-9]+).*/', '$1', $wp_version ) );
+$admin_body_class .= ' branch-' . str_replace( array( '.', ',' ), '-', floatval( get_bloginfo( 'version' ) ) );
+$admin_body_class .= ' version-' . str_replace( '.', '-', preg_replace( '/^([.0-9]+).*/', '$1', get_bloginfo( 'version' ) ) );
 $admin_body_class .= ' admin-color-' . sanitize_html_class( get_user_option( 'admin_color' ), 'fresh' );
-$admin_body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_locale() ) ) );
+$admin_body_class .= ' locale-' . sanitize_html_class( strtolower( str_replace( '_', '-', get_user_locale() ) ) );
 
 if ( wp_is_mobile() )
 	$admin_body_class .= ' mobile';
@@ -162,7 +179,7 @@
 </head>
 <?php
 /**
- * Filter the CSS classes for the body tag in the admin.
+ * Filters the CSS classes for the body tag in the admin.
  *
  * This filter differs from the {@see 'post_class'} and {@see 'body_class'} filters
  * in two important ways:
@@ -217,21 +234,21 @@
 
 if ( is_network_admin() ) {
 	/**
-	 * Print network admin screen notices.
+	 * Prints network admin screen notices.
 	 *
 	 * @since 3.1.0
 	 */
 	do_action( 'network_admin_notices' );
 } elseif ( is_user_admin() ) {
 	/**
-	 * Print user admin screen notices.
+	 * Prints user admin screen notices.
 	 *
 	 * @since 3.1.0
 	 */
 	do_action( 'user_admin_notices' );
 } else {
 	/**
-	 * Print admin screen notices.
+	 * Prints admin screen notices.
 	 *
 	 * @since 3.1.0
 	 */
@@ -239,7 +256,7 @@
 }
 
 /**
- * Print generic admin screen notices.
+ * Prints generic admin screen notices.
  *
  * @since 3.1.0
  */