fix linter

Author: dimpase

src/sage/combinat/integer_vectors_mod_permgroup.py

@@ -841,7 +841,7 @@ def cardinality(self):
 
         The algorithm utilises :wikipedia:`Cycle Index Theorem <Cycle_index>`, allowing
         for a faster than a plain enumeration computation.
-        
+
         EXAMPLES:
 
         With a trivial group all vectors are canonical::