Fix pep8 whitespace violation.

lms/djangoapps/courseware/features/video.py

@@ -15,14 +15,14 @@ def does_autoplay(step):
 def view_video(step):
     coursename = TEST_COURSE_NAME.replace(' ', '_')
     i_am_registered_for_the_course(step, coursename)
-    
+
     # Make sure we have a video
     video = add_video_to_course(coursename)
     chapter_name = TEST_SECTION_NAME.replace(" ", "_")
     section_name = chapter_name
     url = django_url('/courses/edx/Test_Course/Test_Course/courseware/%s/%s' %
                      (chapter_name, section_name))
-    
+
     world.browser.visit(url)