add . at end of sentence

lang/en/moodleoverflow.php

@@ -425,7 +425,7 @@
 $string['nothing'] = 'Nothing';
 $string['questions'] = 'Questions';
 $string['questions_and_posts'] = 'Questions and answers';
-$string['desc:review_questions'] = 'All questions are going to be reviewed by a teacher before being published';
+$string['desc:review_questions'] = 'All questions are going to be reviewed by a teacher before being published.';
 $string['desc:review_everything'] = 'All questions and answers are going to be reviewed by a teacher before being published.';
 $string['allowreview'] = 'Allow moderated forums';
 $string['allowreview_desc'] = 'Allow teachers to enable that all posts (or only all questions) have to be reviewed by them in order to be published.';