ony can be also on

[matkoniecz]

See streetcomplete/StreetComplete@9276a4c for case found in wild

[matkoniecz]

CI failure has way too many lines, but it seems to be caused by

skipping aspell tests. Got error during import:
  No module named 'aspell'
    'error during import:\n%s' % (exp,))
-- Docs: https://docs.pytest.org/en/stable/warnings.html

unrelated to this PR

[peternewman]

CI failure has way too many lines, but it seems to be caused by

Read up a bit further:
error ony: correction 'only,on,' contains a comma *not* followed by a space