Convert comment to translator comment.

libraries/messages.inc.php

@@ -29,8 +29,7 @@ $mysql_5_1_doc_lang = _pgettext('$mysql_5_1_doc_lang', 'en');
 
 $day_of_week = array(__('Sun'), __('Mon'), __('Tue'), __('Wed'), __('Thu'), __('Fri'), __('Sat'));
 $month = array(__('Jan'), __('Feb'), __('Mar'), __('Apr'), __('May'), __('Jun'), __('Jul'), __('Aug'), __('Sep'), __('Oct'), __('Nov'), __('Dec'));
-// See http://www.php.net/manual/en/function.strftime.php to define the
-// variable below
+/* l10n: See http://www.php.net/manual/en/function.strftime.php to define the format string */
 $datefmt = __('%B %d, %Y at %I:%M %p');
 $timespanfmt = __('%s days, %s hours, %s minutes and %s seconds');