Style fix

Author: snbianco

astroquery/mast/tests/test_mast_remote.py

@@ -811,7 +811,7 @@ def test_observations_get_cloud_uris_list_input(self):
         expected = ['s3://stpubdata/hst/public/u24r/u24r0102t/u24r0102t_c1f.fits',
                     's3://stpubdata/panstarrs/ps1/public/rings.v3.skycell/1334/061/rings.v3.skycell.1334.'
                     '061.stk.r.unconv.exp.fits']
-        
+
         # enable access to public AWS S3 bucket
         Observations.enable_cloud_dataset()