Minor style change

Author: calebmadrigal

combinatorics.py

@@ -18,6 +18,7 @@ def permute(current, rest):
         if rest == []:
             result.append(current)
             return
+
         for r in rest:
             permute(current + (r,), [i for i in rest if i != r])
 
@@ -40,6 +41,7 @@ def _subsets(current, rest):
     _subsets((), lst)
     return result
 
+
 if __name__ == "__main__":
     print("Permutations of ['a','b','c']:", permutations(['a','b','c']))
     print("Subsets of ['a','b','c']:", subsets(['a','b','c']))