Although the code was ported from setuptools, it wasn't ported from the long stable implementation, but was ported following the recent refactor, which had a [regression](https://bitbucket.org/pypa/setuptools/issues/425/odd-failure-on-183-missing-files-but-they) revealing that the [docstring no longer matched the implementation](https://bitbucket.org/pypa/setuptools/commits/72ec36bea07c7dd1cf48e20894864e8a4e1b480f). The latest implementation provides [a more elegant approach](https://bitbucket.org/pypa/setuptools/src/738b139f3016a05084c9f34c6364d7d20b3aac9d/setuptools/__init__.py?fileviewer=file-view-default#__init__.py-154), but continues to maintain the expectation of the setuptools implementation.

I still need to address Eric's question about what filelists are affected, but also now update the patch to ensure that the disparity between findall('.') and findall(anything_else) is captured.