Merge pull request #2997 from edx/zoldak/fix-pragma-pep8

cms/djangoapps/contentstore/features/advanced_settings.py

cms/djangoapps/contentstore/features/checklists.py

cms/djangoapps/contentstore/features/component.py

...ontentstore/features/component_settings_editor_helpers.py

cms/djangoapps/contentstore/features/course-export.py

cms/djangoapps/contentstore/features/course-settings.py

cms/djangoapps/contentstore/features/course-team.py

cms/djangoapps/contentstore/features/course-updates.py

cms/djangoapps/contentstore/features/courses.py

cms/djangoapps/contentstore/features/discussion-editor.py

cms/djangoapps/contentstore/features/grading.py

cms/djangoapps/contentstore/features/html-editor.py

cms/djangoapps/contentstore/features/problem-editor.py

cms/djangoapps/contentstore/features/signup.py

cms/djangoapps/contentstore/features/static-pages.py

cms/djangoapps/contentstore/features/subsection.py

cms/djangoapps/contentstore/features/textbooks.py

cms/djangoapps/contentstore/features/upload.py

cms/djangoapps/contentstore/features/video.py

cms/djangoapps/contentstore/tests/test_contentstore.py