RET504 - false positive

[Czaki]

I have checked that same problem also occurs in flake8-return so it is not a bug in logic translation, but definitely there is a problem with this rule. I also see #1035 with similar problems related to this plugin/set of rules.

The following code is reported as breaking RET504.

    def get_changes(self):
        ret = self.changes
        self.changes = []
        return ret

On one side, it fits in the description, on the other side, I do not see any better way to write such code.
Similarly to #1035 I do not use flake8-return earlier but would like to try these rules when seeing the description in the ruff readme.

[charliermarsh]

That makes sense. We could cause assignments to invalidate the rule. I think we already do that for function calls.