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-rw-r--r--sphinx/builders/manpage.py3
1 files changed, 1 insertions, 2 deletions
diff --git a/sphinx/builders/manpage.py b/sphinx/builders/manpage.py
index 25287f2be..a7bbe782d 100644
--- a/sphinx/builders/manpage.py
+++ b/sphinx/builders/manpage.py
@@ -13,7 +13,6 @@ from os import path
from docutils.frontend import OptionParser
from docutils.io import FileOutput
-from six import string_types
from sphinx import addnodes
from sphinx.builders import Builder
@@ -77,7 +76,7 @@ class ManualPageBuilder(Builder):
logger.warning(__('"man_pages" config value references unknown '
'document %s'), docname)
continue
- if isinstance(authors, string_types):
+ if isinstance(authors, str):
if authors:
authors = [authors]
else: