Index: wp-admin/themes.php
===================================================================
--- wp-admin/themes.php	(revision 39303)
+++ wp-admin/themes.php	(working copy)
@@ -177,7 +177,7 @@
 $ct = wp_get_theme();
 
 if ( $ct->errors() && ( ! is_multisite() || current_user_can( 'manage_network_themes' ) ) ) {
-	echo '<div class="error"><p>' . sprintf( __( 'ERROR: %s' ), $ct->errors()->get_error_message() ) . '</p></div>';
+	echo '<div class="error"><p>' . __( 'ERROR:' ) . ' ' . $ct->errors()->get_error_message() . '</p></div>';
 }
 
 /*