diff --git a/pre_commit/commands/hook_impl.py b/pre_commit/commands/hook_impl.py
index c5d20169..ba6491b4 100644
--- a/pre_commit/commands/hook_impl.py
+++ b/pre_commit/commands/hook_impl.py
@@ -114,7 +114,9 @@ def _rev_exists(rev: str) -> bool:
 
 
 def _is_ancestor(ancestor: str, rev: str):
-    return not subprocess.call(('git', 'merge-base', '--is-ancestor', ancestor, rev))
+    return not subprocess.call(
+        ('git', 'merge-base', '--is-ancestor', ancestor, rev)
+    )
 
 
 def _pre_push_ns(
@@ -130,7 +132,8 @@ def _pre_push_ns(
         local_branch, local_sha, remote_branch, remote_sha = parts
         if local_sha == Z40:
             continue
-        elif remote_sha != Z40 and _rev_exists(remote_sha) and _is_ancestor(remote_sha, local_sha):
+        elif remote_sha != Z40 and _rev_exists(remote_sha) \
+            and _is_ancestor(remote_sha, local_sha):
             return _ns(
                 'pre-push', color,
                 from_ref=remote_sha, to_ref=local_sha,