Merge pull request #8185 from bbodenmiller/patch-3

fix markdown formatting

doc/update/6.x-or-7.x-to-7.3.md

@@ -267,6 +267,7 @@ mysql> \q
 #   Set production -> username: git
 #   Set production -> password: the password your replaced $password with earlier
 sudo -u git -H editor /home/git/gitlab/config/database.yml
+```
 ## Things went south? Revert to previous version (6.0)