dev gitiginore: sync with ansible core (#1951)

Fixes: #1937

.gitignore

@@ -36,6 +36,7 @@ docs/docsite/rst/index.rst
 docs/docsite/rst/cli/ansible-*.rst
 docs/docsite/rst/cli/ansible.rst
 docs/docsite/rst/dev_guide/collections_galaxy_meta.rst
+docs/docsite/rst/dev_guide/testing/sanity/index.rst.new
 docs/docsite/rst/dev_guide/index.rst
 docs/docsite/rst/modules/*.rst
 docs/docsite/rst/collections/*.rst
@@ -90,15 +91,15 @@ Vagrantfile
 /lib/ansible_base.egg-info/
 # First used in the `devel` branch during Ansible 2.11 development.
 /lib/ansible_core.egg-info/
+# First used in the `devel` branch during Ansible 2.18 development.
+/ansible_core.egg-info/
 # vendored lib dir
 lib/ansible/_vendor/*
 !lib/ansible/_vendor/__init__.py
 # test stuff
 /test/integration/cloud-config-*.*
 !/test/integration/cloud-config-*.*.template
 .python-version
-/hacking/tests/selinux/*.mod
-/hacking/tests/selinux/*.pp
 # Release directory
 packaging/release/ansible_release
 /.cache/