diff -r c7c34916027a -r 177826044cd9 wp/wp-includes/customize/class-wp-customize-background-image-control.php
--- a/wp/wp-includes/customize/class-wp-customize-background-image-control.php	Mon Oct 14 18:06:33 2019 +0200
+++ b/wp/wp-includes/customize/class-wp-customize-background-image-control.php	Mon Oct 14 18:28:13 2019 +0200
@@ -26,10 +26,14 @@
 	 * @param WP_Customize_Manager $manager Customizer bootstrap instance.
 	 */
 	public function __construct( $manager ) {
-		parent::__construct( $manager, 'background_image', array(
-			'label'    => __( 'Background Image' ),
-			'section'  => 'background_image',
-		) );
+		parent::__construct(
+			$manager,
+			'background_image',
+			array(
+				'label'   => __( 'Background Image' ),
+				'section' => 'background_image',
+			)
+		);
 	}
 
 	/**
@@ -41,11 +45,15 @@
 		parent::enqueue();
 
 		$custom_background = get_theme_support( 'custom-background' );
-		wp_localize_script( 'customize-controls', '_wpCustomizeBackground', array(
-			'defaults' => ! empty( $custom_background[0] ) ? $custom_background[0] : array(),
-			'nonces' => array(
-				'add' => wp_create_nonce( 'background-add' ),
-			),
-		) );
+		wp_localize_script(
+			'customize-controls',
+			'_wpCustomizeBackground',
+			array(
+				'defaults' => ! empty( $custom_background[0] ) ? $custom_background[0] : array(),
+				'nonces'   => array(
+					'add' => wp_create_nonce( 'background-add' ),
+				),
+			)
+		);
 	}
 }