Fix PEP8 styling error

Co-authored-by: Raphael Guzman <[email protected]>

Author: MaxFBurg

datajoint/settings.py

@@ -138,7 +138,7 @@ def get_store_spec(self, store):
         spec_keys = {  # REQUIRED in uppercase and allowed in lowercase
             'file': ('PROTOCOL', 'LOCATION', 'subfolding', 'stage'),
             's3': ('PROTOCOL', 'ENDPOINT', 'BUCKET', 'ACCESS_KEY', 'SECRET_KEY', 'LOCATION',
-                    'secure', 'subfolding', 'stage', 'proxy_server')}
+                   'secure', 'subfolding', 'stage', 'proxy_server')}
 
         try:
             spec_keys = spec_keys[spec.get('protocol', '').lower()]