Index: script-loader.php
===================================================================
--- script-loader.php	(revision 11518)
+++ script-loader.php	(working copy)
@@ -73,7 +73,7 @@
 	$scripts->add( 'quicktags', "/wp-includes/js/quicktags$suffix.js", false, '20090307' );
 	$scripts->localize( 'quicktags', 'quicktagsL10n', array(
 		'quickLinks' => __('(Quick Links)'),
-		'wordLookup' => __('Enter a word to look up:'),
+		'wordLookup' => /* translators: do not use HTML entities ( , etc.): string is used in JavaScript alert() message */ __('Enter a word to look up:'),
 		'dictionaryLookup' => esc_attr(__('Dictionary lookup')),
 		'lookup' => esc_attr(__('lookup')),
 		'closeAllOpenTags' => esc_attr(__('Close all open tags')),