Makes /after/ lazy

Author: Tercio de Melo

syntax_sugar/infix.py

@@ -19,7 +19,7 @@ def __rtruediv__(self, left):
 ffilter = infix(flip(filter))
 freduce = infix(flip(reduce))
 take = infix(compose(list, islice))
-after = infix(compose(list, lambda seq, idx: islice(seq, idx, None)))
+after = infix(lambda seq, idx: islice(seq, idx, None))
 
 INF = float('inf')
 NEGINF = float('-inf')

tests/test_infix.py

@@ -87,6 +87,7 @@ def test_take():
 
 def test_after():
     assert list(1 /to/ 10 /after/ 2 /take/ 3) == [3, 4, 5]
+    assert list(1 /to/ INF /after/ 2 /take/ 3) == [3, 4, 5]
     assert list(10 /to/ 1 /after/ 3 /take/ 2) == [7, 6]
 
 def test_is_a():