> Note for the avoidance of doubt that the change here is NOT documented by osm_wiki_documentation_page https://wiki.openstreetmap.org/wiki/Mechanical_Edits (there is no mention of fixme on that page) despite a changeset tag suggesting that it is. This is essentially an undiscussed mechanical edit. 

That is because it was removed in https://wiki.openstreetmap.org/w/index.php?title=Mechanical_Edits%2FMateusz_Konieczny_-_bot_account%2Ffixing_malformed_shop_tags&type=revision&diff=2527714&oldid=2525269 to document that it will not be done again.

There is "Additionally https://www.openstreetmap.org/changeset/136075427 resulted in stopping to change shop=fixme"