Index: src/wp-content/themes/twentytwelve/functions.php
===================================================================
--- src/wp-content/themes/twentytwelve/functions.php	(revision 47570)
+++ src/wp-content/themes/twentytwelve/functions.php	(working copy)
@@ -451,7 +451,7 @@
 				if ( $commenter['comment_author_email'] ) {
 					$moderation_note = __( 'Your comment is awaiting moderation.', 'twentytwelve' );
 				} else {
-					$moderation_note = __( 'Your comment is awaiting moderation. This is a preview, your comment will be visible after it has been approved.', 'twentytwelve' );
+					$moderation_note = __( 'Your comment is awaiting moderation. This is a preview. Your comment will be visible after it has been approved.', 'twentytwelve' );
 				}
 				?>