Index: src/wp-admin/includes/class-wp-themes-list-table.php
===================================================================
--- src/wp-admin/includes/class-wp-themes-list-table.php	(revision 46373)
+++ src/wp-admin/includes/class-wp-themes-list-table.php	(working copy)
@@ -281,7 +281,7 @@
 				<?php
 				if ( $theme->parent() ) {
 					printf(
-						/* translators: %s: Link to documentation on child themes. */
+						/* translators: 1: Link to documentation on child themes 2: Name of parent theme. */
 						' <p class="howto">' . __( 'This <a href="%1$s">child theme</a> requires its parent theme, %2$s.' ) . '</p>',
 						__( 'https://developer.wordpress.org/themes/advanced-topics/child-themes/' ),
 						$theme->parent()->display( 'Name' )