Merge pull request #15776 from edx/christina/slash-the-slash-2

...angoapps/contentstore/management/commands/clone_course.py

...apps/contentstore/management/commands/edit_course_tabs.py

.../contentstore/management/commands/empty_asset_trashcan.py

cms/djangoapps/contentstore/management/commands/export.py

...djangoapps/contentstore/management/commands/git_export.py

...oapps/contentstore/management/commands/reindex_library.py

common/djangoapps/course_modes/admin.py

common/djangoapps/course_modes/views.py

common/djangoapps/django_comment_common/tests.py

...apps/student/management/commands/anonymized_id_mapping.py

...angoapps/student/management/commands/change_enrollment.py

...goapps/student/management/commands/create_random_users.py

common/djangoapps/student/management/commands/create_user.py

common/djangoapps/student/models.py

common/djangoapps/student/tests/test_auto_auth.py

common/djangoapps/student/tests/tests.py

common/djangoapps/student/views.py

common/djangoapps/terrain/steps.py

common/djangoapps/track/contexts.py

common/djangoapps/util/request.py