document context manager about filesystem_tree.py

[chadwhitacre]

Let's knock this out and then make a release so we can see how #15 behaves on PyPI. :)

[pjz]

I'm unclear what needs documentation. It's now a context manager, which has a specific python meaning.

[pjz]

There's docs there already that indicate that it is now one.

[chadwhitacre]

There's docs there already that indicate that it is now one.

Really? I missed that. You mean in the __enter__ and __exit__ docstrings? Those don't hit the published docs.

Anyway, I'm on it. PR forthcoming ...

[pjz]

That's what I meant - I didn't realize they didn't get picked up; I don't know sphinx that well.

[chadwhitacre]

Ah, gotcha.