Upgrade linter (#4461)

script/fingerprint_frontend.py

@@ -34,5 +34,6 @@ FINGERPRINTS = {}
     with open(fingerprint_file, 'w') as fp:
         fp.write(result)
 
+
 if __name__ == '__main__':
     fingerprint()

script/gen_requirements_all.py

@@ -138,5 +138,6 @@ def main():
 
     write_file(data)
 
+
 if __name__ == '__main__':
     main()

script/update_mdi.py

@@ -63,5 +63,6 @@ def main():
 
     print('Updated to latest version')
 
+
 if __name__ == '__main__':
     main()