Fix whitespace errors found by flake8

csv_metadata_quality/check.py

@@ -1,5 +1,6 @@
 import pandas as pd
 
+
 def issn(field):
     """Check if an ISSN is valid.
 
@@ -71,7 +72,6 @@ def separators(field):
         if len(match) > 0:
             print(f'Invalid multi-value separator: {field}')
 
-
     return field
 
 

csv_metadata_quality/fix.py

@@ -1,6 +1,7 @@
 import pandas as pd
 import re
 
+
 def whitespace(field):
     """Fix whitespace issues.
 
@@ -34,4 +35,3 @@ def whitespace(field):
     new_field = '||'.join(values)
 
     return new_field
-