diff -r c7c34916027a -r 177826044cd9 wp/wp-includes/deprecated.php
--- a/wp/wp-includes/deprecated.php	Mon Oct 14 18:06:33 2019 +0200
+++ b/wp/wp-includes/deprecated.php	Mon Oct 14 18:28:13 2019 +0200
@@ -1878,7 +1878,7 @@
 	if ( !$fullsize && $src = wp_get_attachment_thumb_url( $post->ID ) ) {
 		// We have a thumbnail desired, specified and existing
 
-		$src_file = basename($src);
+		$src_file = wp_basename($src);
 	} elseif ( wp_attachment_is_image( $post->ID ) ) {
 		// We have an image without a thumbnail
 
@@ -1888,7 +1888,7 @@
 		// No thumb, no image. We'll look for a mime-related icon instead.
 
 		$icon_dir = apply_filters( 'icon_dir', get_template_directory() . '/images' );
-		$src_file = $icon_dir . '/' . basename($src);
+		$src_file = $icon_dir . '/' . wp_basename($src);
 	}
 
 	if ( !isset($src) || !$src )
@@ -2508,10 +2508,14 @@
 }
 
 /**
- * Is the current admin page generated by a plugin?
+ * Determines whether the current admin page is generated by a plugin.
  *
  * Use global $plugin_page and/or get_plugin_page_hookname() hooks.
- *
+ * 
+ * For more information on this and similar theme functions, check out
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 
+ * Conditional Tags} article in the Theme Developer Handbook.
+ * 
  * @since 1.5.0
  * @deprecated 3.1.0
  *
@@ -3054,7 +3058,7 @@
  */
 function get_theme_data( $theme_file ) {
 	_deprecated_function( __FUNCTION__, '3.4.0', 'wp_get_theme()' );
-	$theme = new WP_Theme( basename( dirname( $theme_file ) ), dirname( dirname( $theme_file ) ) );
+	$theme = new WP_Theme( wp_basename( dirname( $theme_file ) ), dirname( dirname( $theme_file ) ) );
 
 	$theme_data = array(
 		'Name' => $theme->get('Name'),
@@ -3713,8 +3717,12 @@
 }
 
 /**
- * Whether the current URL is within the comments popup window.
- *
+ * Determines whether the current URL is within the comments popup window.
+ * 
+ * For more information on this and similar theme functions, check out
+ * the {@link https://developer.wordpress.org/themes/basics/conditional-tags/ 
+ * Conditional Tags} article in the Theme Developer Handbook.
+ * 
  * @since 1.5.0
  * @deprecated 4.5.0
  *
@@ -3737,12 +3745,12 @@
 }
 
 /**
- * Adds element attributes to open links in new windows.
+ * Adds element attributes to open links in new tabs.
  *
  * @since 0.71
  * @deprecated 4.5.0
  *
- * @param string $text Content to replace links to open in a new window.
+ * @param string $text Content to replace links to open in a new tab.
  * @return string Content that has filtered links.
  */
 function popuplinks( $text ) {