formatting cleanup on mysql_to_postgresql.md

doc/update/mysql_to_postgresql.md

@@ -75,7 +75,7 @@ test -e /opt/gitlab/embedded/service/gitlab-rails/db/schema.rb.bundled || sudo /
 ## Converting a GitLab backup file from MySQL to Postgres
 **Note:** Please make sure to have Python 2.7.x (or higher) installed.
 
-GitLab backup files (<timestamp>_gitlab_backup.tar) contain a SQL dump. Using the lanyrd database converter we can replace a MySQL database dump inside the tar file with a Postgres database dump. This can be useful if you are moving to another server.
+GitLab backup files (`<timestamp>_gitlab_backup.tar`) contain a SQL dump. Using the lanyrd database converter we can replace a MySQL database dump inside the tar file with a Postgres database dump. This can be useful if you are moving to another server.
 
 ```
 # Stop GitLab