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-rw-r--r--sphinx/setup_command.py3
1 files changed, 1 insertions, 2 deletions
diff --git a/sphinx/setup_command.py b/sphinx/setup_command.py
index 87944167a..b8efc13e6 100644
--- a/sphinx/setup_command.py
+++ b/sphinx/setup_command.py
@@ -17,8 +17,7 @@ import os
import sys
from distutils.cmd import Command
from distutils.errors import DistutilsOptionError, DistutilsExecError
-
-from six import StringIO
+from io import StringIO
from sphinx.application import Sphinx
from sphinx.cmd.build import handle_exception