Survived Mutant

[Oddant1]

Example of a survived mutant from running mutmut.

1. The first commit, 09702b5, shows a legitimate survivor.
2. The second commit, f6ae76e, adds a "survivor" that actually causes pytest to error out because it doesn't pass initializing the plugin. The fact mutmut marks this as a survivor suggests that it runs tests a bit differently from normal. Likely skipping some of our init and running the tests in more complete isolation. We never run core_features as an Action during testing only as a raw Python function, so I suppose it is technically correct.
3. The third commit, c105c82, just adds the changes I made to pyproject.toml for informative purposes.