Restrict flake8 hook to .rst files

Author: shruti-sridhar

.pre-commit-config.yaml

@@ -50,13 +50,13 @@ repos:
   rev: 3.9.2
   hooks:
   - id: flake8
+    files: \.rst$
     additional_dependencies: [
         'flake8-rst==0.8.0',
         'flake8-bugbear==20.1.4',
         'flake8-logging-format==0.6.0',
         'flake8-implicit-str-concat==0.2.0',
     ]
-    stages: [manual]
 
 # We use the Python version instead of the original version which seems to require Docker
 # https://github.com/koalaman/shellcheck-precommit