Fix double output in the coverage report

manage.py

@@ -20,12 +20,12 @@ def coverage_context():
     with cov.collect():
         yield
     cov.save()
-    print(f'Coverage is {cov.report()}%')
+    covered = cov.report()
+    print(f'Coverage is {covered}%')
 
     cov.html_report()
     cov.xml_report()
 
-    covered = cov.report()
     fail_under = cov.config.get_option('report:fail_under')
     if covered < fail_under:
         raise SystemExit(2)