Merge pull request #5405 from tk0miya/4611_run_epubcheck

Run epubcheck on CI

.circleci/config.yml

@@ -3,6 +3,8 @@ jobs:
   build:
     docker:
       - image: sphinxdoc/docker-ci
+        environment:
+          DO_EPUBCHECK: 1
     working_directory: /sphinx
     steps:
       - checkout

tests/roots/test-root/index.txt

@@ -37,7 +37,6 @@ Indices and tables
 
 * :ref:`genindex`
 * :ref:`modindex`
-* :ref:`search`
 
 References
 ==========

tests/test_build_html.py

@@ -357,7 +357,6 @@ def test_html4_output(app, status, warning):
          "[@class='reference external']", ''),
         (".//li/p/a[@href='genindex.html']/span", 'Index'),
         (".//li/p/a[@href='py-modindex.html']/span", 'Module Index'),
-        (".//li/p/a[@href='search.html']/span", 'Search Page'),
         # custom sidebar only for contents
         (".//h4", 'Contents sidebar'),
         # custom JavaScript