flake8: Ignore .git

setup.cfg

@@ -2,5 +2,5 @@
 universal = True
 
 [flake8]
-exclude = youtube_dl/extractor/__init__.py,devscripts/buildserver.py,setup.py,build
+exclude = youtube_dl/extractor/__init__.py,devscripts/buildserver.py,setup.py,build,.git
 ignore = E501