Apply Black to entire codebase (#990)

* Apply Black to entire codebase
* Add Black GitHub Action

.github/workflows/black.yml

@@ -0,0 +1,22 @@
+name: black
+
+on: [push, pull_request]
+
+jobs:
+  build:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python 3.8
+      uses: actions/setup-python@v1
+      with:
+        python-version: 3.8
+    - name: Install Black
+      run: |
+        python -m pip install --upgrade pip
+        pip install Black
+    - name: run black
+      run: |
+        black crispy_forms --check

README.rst

@@ -6,6 +6,9 @@ django-crispy-forms
    :alt: Build Status
    :target: https://travis-ci.org/django-crispy-forms/django-crispy-forms
 
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/psf/black
+
 .. image:: http://codecov.io/github/django-crispy-forms/django-crispy-forms/coverage.svg?branch=master
    :target: http://codecov.io/github/django-crispy-forms/django-crispy-forms?branch=master
 

crispy_forms/__init__.py

@@ -1 +1 @@
-__version__ = '1.8.1'
+__version__ = "1.8.1"

crispy_forms/base.py

@@ -8,6 +8,7 @@ class KeepContext:
     Layout objects should use `extra_context` to introduce context variables, never
     touch context object themselves, that could introduce side effects.
     """
+
     def __init__(self, context, keys):
         self.context = context
         self.keys = keys