Specific sphinx version

cocoatomo · cocoatomo · commit 32781d53297a · 2020-04-11T07:57:06.000+09:00
the version number from .travis.yml of cpython-doc-catalog
diff --git a/.travis.yml b/.travis.yml
@@ -19,7 +19,7 @@ env:
     # Number of parent commits
     - NUM_PARENTS=$(git log --pretty=%P -n 1 HEAD | awk '{ print NF }')
 install:
-  - pip install sphinx
+  - pip install sphinx==1.8.2
   - pip install blurb
   - pip install transifex-client
   - pip install sphinx-intl
