Merge pull request #26522 from edx/usamasadiq/bom-2356-pyupgrade

lms/djangoapps/course_blocks/transformers/hidden_content.py

lms/djangoapps/course_blocks/transformers/library_content.py

lms/djangoapps/course_blocks/transformers/split_test.py

lms/djangoapps/course_blocks/transformers/start_date.py

lms/djangoapps/course_blocks/transformers/tests/helpers.py

...s/course_blocks/transformers/tests/test_hidden_content.py

.../course_blocks/transformers/tests/test_library_content.py

...urse_blocks/transformers/tests/test_load_override_data.py

...oapps/course_blocks/transformers/tests/test_split_test.py

...oapps/course_blocks/transformers/tests/test_start_date.py

.../course_blocks/transformers/tests/test_user_partitions.py

lms/djangoapps/course_blocks/transformers/user_partitions.py

lms/djangoapps/course_blocks/usage_info.py

lms/djangoapps/course_goals/api.py

lms/djangoapps/course_goals/handlers.py

lms/djangoapps/course_goals/migrations/0001_initial.py

...goapps/course_goals/migrations/0002_auto_20171010_1129.py

lms/djangoapps/course_goals/models.py

lms/djangoapps/course_goals/tests/test_api.py

lms/djangoapps/course_goals/views.py