Upstream Suor/funcy state of the touched files before c0960e614e

funcy/seqs.py

@@ -363,12 +363,8 @@ def _cut_iter(drop_tail, n, step, seq):
         if len(pool) < n:
             break
         yield pool
-        if step < n:
-            pool = pool[step:]
-            pool.extend(islice(it, step))
-        else:
-            take(step - n, it)  # discard the gap between parts
-            pool = take(n, it)
+        pool = pool[step:]
+        pool.extend(islice(it, step))
     if not drop_tail:
         for item in _cut_seq(drop_tail, n, step, pool):
             yield item