Summary

I have this snipped that will be formatted by ruff format like this.

OPTIONS = {}
HG_ENV_PREFIX = 'HG_USERVAR_'
for key, value in six.iteritems(os.environ):
  if key.startswith(HG_ENV_PREFIX):
    OPTIONS[key[len(HG_ENV_PREFIX) :]] = value

flake8 will throw a warning for this: E203 whitespace before ':'

ruff check won't give a warning here.

ruff check --select E203 --preview
All checks passed!

Is flake8 or ruff correct here? I need to use # fmt: skip here. Maybe the formatter should avoid that whitespace?

Version

0.14.5