From b8631079bfac00c7823b25990105b85a180208b4 Mon Sep 17 00:00:00 2001
From: Jon Dufresne <jon.dufresne@gmail.com>
Date: Tue, 20 Nov 2018 19:50:08 -0800
Subject: Replace six.string_types with native str

---
 sphinx/jinja2glue.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

(limited to 'sphinx/jinja2glue.py')

diff --git a/sphinx/jinja2glue.py b/sphinx/jinja2glue.py
index c3ed86e09..739437a16 100644
--- a/sphinx/jinja2glue.py
+++ b/sphinx/jinja2glue.py
@@ -17,7 +17,6 @@ from jinja2 import FileSystemLoader, BaseLoader, TemplateNotFound, \
     contextfunction
 from jinja2.sandbox import SandboxedEnvironment
 from jinja2.utils import open_if_exists
-from six import string_types
 
 from sphinx.application import TemplateBridge
 from sphinx.util import logging
@@ -33,7 +32,7 @@ if False:
 
 def _tobool(val):
     # type: (unicode) -> bool
-    if isinstance(val, string_types):
+    if isinstance(val, str):
         return val.lower() in ('true', '1', 'yes', 'on')
     return bool(val)
 
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