test(clone): verify stderr for a failing clone into a non-empty dir by muggenhor · Pull Request #1225 · gitpython-developers/GitPython

This adds a test case that would have caught #1221. It thus addresses (partially) the concern of "how to prevent breaking things in the future" expressed in #1223. It additionally verifies that the fix in #1224 actually works.

Edit: this should introduce a single failing test case that should be flipped to passing by #1224.