note about sys.argv hack

hooks/pre-commit

@@ -4,6 +4,7 @@ import glob
 import os
 import sys
 
+# pep8.py uses sys.argv to find setup.cfg
 sys.argv = [os.path.join(os.path.dirname(__file__), os.pardir, os.pardir)]
 
 # git usurbs your bin path for hooks and will always run system python