Merge branch 'lazy_series/check_undefined' of github.com:tscrim/sage into lazy_series/check_undefined

Author: tscrim

src/sage/rings/lazy_series.py

@@ -1985,7 +1985,6 @@ def _acted_upon_(self, scalar, self_on_left):
 
             sage: 1 * M is M
             True
-
         TESTS:
 
         Check that non-commutativity is taken into account::