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

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

setup.cfg

@@ -69,12 +69,12 @@ testing =
     attrs>=19.2.0
     hypothesis>=3.56
     mock
+    more-itertools
     nose
     pygments>=2.7.2
     requests
     setuptools
     xmlschema
-    more_itertools
 
 [options.package_data]
 _pytest = py.typed

src/_pytest/mark/structures.py

@@ -22,7 +22,8 @@
 from typing import TypeVar
 from typing import Union
 
-from more_itertools import flatten, always_iterable
+from more_itertools import always_iterable
+from more_itertools import flatten
 
 from .._code import getfslineno
 from ..compat import ascii_escaped