diff --git a/more_executors/__init__.py b/more_executors/__init__.py
index c93439d3..2d87b62f 100644
--- a/more_executors/__init__.py
+++ b/more_executors/__init__.py
@@ -13,6 +13,7 @@
 
 This documentation was built from an unknown revision.
 """
+
 from ._impl.executors import Executors
 from . import futures
 from . import asyncio
diff --git a/more_executors/_impl/futures/zip.py b/more_executors/_impl/futures/zip.py
index a4e35711..320163ec 100644
--- a/more_executors/_impl/futures/zip.py
+++ b/more_executors/_impl/futures/zip.py
@@ -41,7 +41,7 @@ def __init__(self, fs):
         self.lock = Lock()
         self.count_remaining = len(self.fs)
 
-        for (idx, future) in enumerate(self.fs):
+        for idx, future in enumerate(self.fs):
             chain_cancel(self.out, future)
             future.add_done_callback(weak_callback(partial(self.handle_done, idx)))