[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

test-data/unit/check-narrowing.test

@@ -4304,4 +4304,4 @@ def main2(a: Sequence[MyType]) -> MyType:
         if not _is_seq_of(a, int):
             raise Exception("unexpected")
     return a[0]
-[builtins fixtures/exception.pyi]
+[builtins fixtures/exception.pyi]