XBlock fields with formatted-in values can now translate properly

cms/djangoapps/models/settings/course_metadata.py

@@ -140,10 +140,16 @@ class CourseMetadata(object):
         for field in descriptor.fields.values():
             if field.scope != Scope.settings:
                 continue
+
+            field_help = _(field.help)                  # pylint: disable=translation-of-non-string
+            help_args = field.runtime_options.get('help_format_args')
+            if help_args is not None:
+                field_help = field_help.format(**help_args)
+
             result[field.name] = {
                 'value': field.read_json(descriptor),
                 'display_name': _(field.display_name),    # pylint: disable=translation-of-non-string
-                'help': _(field.help),                    # pylint: disable=translation-of-non-string
+                'help': field_help,
                 'deprecated': field.runtime_options.get('deprecated', False)
             }
         return result