🧪🎨 Integrate autopep8 into pre-commit config

This is preferred over black since we care about non-intrusive
formatting suggestions and inclusivity.

Ref: #635 (comment)

Author: webknjaz

.pep8

@@ -0,0 +1,3 @@
+[pep8]
+aggressive = 3
+in-place = true

.pre-commit-config.yaml

@@ -28,6 +28,12 @@ repos:
     files: >-
       ^.*\.rst$
 
+- repo: https://github.com/hhatto/autopep8.git
+  rev: >-  # v2.0.2 does not yet have config, maybe v2.0.3 will, SHA for now
+    5b9110ba53fecd60cd3091fb66d808e8ced3b2e8
+  hooks:
+  - id: autopep8
+
 - repo: https://github.com/pre-commit/pre-commit-hooks.git
   rev: v4.4.0
   hooks: