Index: wp-includes/script-loader.php
===================================================================
--- wp-includes/script-loader.php	(revision 39258)
+++ wp-includes/script-loader.php	(working copy)
@@ -651,7 +651,7 @@
 				/* translators: %s: Plugin name and version */
 				'updateFailedLabel'          => __( '%s update failed' ),
 				/* translators: JavaScript accessible string */
-				'updatingMsg'                => __( 'Updating... please wait.' ), // No ellipsis.
+				'updatingMsg'                => __( 'Updating...' ), // No ellipsis.
 				/* translators: JavaScript accessible string */
 				'updatedMsg'                 => __( 'Update completed successfully.' ),
 				/* translators: JavaScript accessible string */