Remove unnecessary coerce to list (#1321)

sorted() takes any iterable and always returns a new list. No need to
eagerly coerce to a list.

Author: jdufresne

tests/test_commands.py

@@ -2656,7 +2656,7 @@ def test_binary_lists(self, r):
             r.rpush(key, *value)
 
         # check that KEYS returns all the keys as they are
-        assert sorted(r.keys('*')) == sorted(list(iterkeys(mapping)))
+        assert sorted(r.keys('*')) == sorted(iterkeys(mapping))
 
         # check that it is possible to get list content by key name
         for key, value in iteritems(mapping):