Resolve "Provide import functionality via frontend for reviewers"

Closes #189 (closed)

util/importer.py

@@ -127,8 +127,10 @@ def parse_and_import_hektor_json(exam_data):
     hektor_version = exam_data['meta']['version']
     if not (semver.match(hektor_version, RUSTY_HEKTOR_MIN_VER) and
             semver.match(hektor_version, RUSTY_HEKTOR_MAX_VER)):
-        raise ValidationError(f'The data you\'re trying to import has the wrong version {hektor_version}\n'
-                              f'Requirements: {RUSTY_HEKTOR_MIN_VER}, {RUSTY_HEKTOR_MAX_VER}')
+        raise ValidationError(
+            f'The data you\'re trying to import has the wrong version {hektor_version}\n'
+            f'Requirements: {RUSTY_HEKTOR_MIN_VER}, {RUSTY_HEKTOR_MAX_VER}'
+        )
 
     exam, _ = ExamType.objects.get_or_create(**exam_data['module'])