From 2ba839955cd663126aff5fe123c426e711d673b7 Mon Sep 17 00:00:00 2001
From: Antony Lee <anntzer.lee@gmail.com>
Date: Thu, 13 Sep 2018 23:43:55 +0200
Subject: [PATCH] Backport PR #12109: Pin to sphinx<1.8; unremove
 sphinxext.mathmpl.

---
 doc-requirements.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc-requirements.txt b/doc-requirements.txt
index c0ee2014cf64..58a5c698043b 100644
--- a/doc-requirements.txt
+++ b/doc-requirements.txt
@@ -6,7 +6,7 @@
 # Install the documentation requirements with:
 #     pip install -r doc-requirements.txt
 #
-sphinx>=1.3,!=1.5.0,!=1.6.4,!=1.7.3
+sphinx>=1.3,!=1.5.0,!=1.6.4,!=1.7.3,<1.8
 colorspacious
 ipython
 ipywidgets