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-rw-r--r--sphinx/util/inspect.py3
1 files changed, 1 insertions, 2 deletions
diff --git a/sphinx/util/inspect.py b/sphinx/util/inspect.py
index eeedf77ab..603fa88ae 100644
--- a/sphinx/util/inspect.py
+++ b/sphinx/util/inspect.py
@@ -17,8 +17,7 @@ import re
import sys
import typing
from functools import partial
-
-from six import StringIO
+from io import StringIO
from sphinx.util import logging
from sphinx.util.pycompat import NoneType