Black: A couple of weird things I have found.

[maxisme]

Howdy! Sorry you're having trouble. To expedite your experience,
provide some basics for me:

Operating system:
Python version: Python 3.7.3
Black version: black, version 19.3b0
Does also happen on master: Yes

When I run $ black *

• Mishap 1:
  My requirements.txt which contains opencv-python this is getting updated to opencv - python.

• Mishap 2:
  A dictionary like config.settings["foo"]["bar"]["baz"] = 1 is getting converted to:

config.settings["foo"]["bar"][
    "baz"
] = 1

even within the max line.

[JelleZijlstra]

For your first problem, you should probably run black . instead, so Black runs only on Python files, not files that aren't Python but happen to be parseable as such.

[hugovk]

For your second problem, I cannot reproduce it locally with the same Python and Black 19.3b0 or with black.now.sh (also 19.3b0).

What config settings do you have?

[robin-bloehm-mck]

I can reproduce "Mishap 2" using line length 30:
black.now.sh
But this is probably not a very typical setting.

[zsol]

@robin-bloehm-mck what do you prefer Black to do in that case?