It is still best practice to leave a commit message describing what was done in the commit for other contributors to better understand what was done at a glance and since all of these publicly available and is essentially a VCS of its own so the same reasons having good commit messages in those contexts also apply here. It stands that “.” Isn’t a good change set comment so I would really recommend that you take a good look at https://wiki.openstreetmap.org/wiki/Good_changeset_comments and in the future leave better change set comments as it has been recommended to you in the passed, see https://www.openstreetmap.org/user_blocks/15322. 