ignore docs/ when running pep8 checks

Author: andymccurdy

.travis.yml

@@ -13,7 +13,7 @@ install:
   - pip install -e . --use-mirrors
   - "if [[ $TEST_PEP8 == '1' ]]; then pip install pep8 --use-mirrors; fi"
   - "if [[ $TEST_HIREDIS == '1' ]]; then pip install hiredis --use-mirrors; fi"
-script: "if [[ $TEST_PEP8 == '1' ]]; then pep8 --repeat --show-source --exclude=.venv,.tox,dist,doc,build,*.egg .; else python setup.py test; fi"
+script: "if [[ $TEST_PEP8 == '1' ]]; then pep8 --repeat --show-source --exclude=.venv,.tox,dist,docs,build,*.egg .; else python setup.py test; fi"
 matrix:
   include:
     - python: "2.7"