refactor: rename descriptor -> block within lms/djangoapps/course_api

Co-authored-by: Agrendalath <piotr@surowiec.it>

lms/djangoapps/course_api/blocks/transformers/student_view.py

@@ -33,7 +33,7 @@ class StudentViewTransformer(BlockStructureTransformer):
         for block_key in block_structure.topological_traversal():
             block = block_structure.get_xblock(block_key)
 
-            # We're iterating through descriptors (not bound to a user) that are
+            # We're iterating through blocks (not bound to a user) that are
             # given to us by the modulestore. The reason we look at
             # block.__class__ is to avoid the XModuleDescriptor -> XModule
             # proxying that would happen if we just examined block directly,

lms/djangoapps/course_api/tests/test_serializers.py

@@ -163,8 +163,8 @@ class TestCourseDetailSerializer(TestCourseSerializer):  # lint-amnesty, pylint:
         super().setUp()
 
         # update the expected_data to include the 'overview' data.
-        about_descriptor = XBlock.load_class('about')
-        overview_template = about_descriptor.get_template('overview.yaml')
+        about_block = XBlock.load_class('about')
+        overview_template = about_block.get_template('overview.yaml')
         self.expected_data['overview'] = overview_template.get('data')
 
     # override test case

lms/djangoapps/course_home_api/progress/views.py

@@ -226,8 +226,8 @@ class ProgressTabView(RetrieveAPIView):
             user_grade = course_grade.percent
             user_has_passing_grade = user_grade >= course.lowest_passing_grade
 
-        descriptor = modulestore().get_course(course_key)
-        grading_policy = descriptor.grading_policy
+        block = modulestore().get_course(course_key)
+        grading_policy = block.grading_policy
         verification_status = IDVerificationService.user_status(student)
         verification_link = None
         if verification_status['status'] is None or verification_status['status'] == 'expired':