Add latest version of Sphinx (#4264)

* Add latest version of Sphinx

* Flake8 fix

var/spack/repos/builtin/packages/py-typing/package.py

@@ -0,0 +1,40 @@
+##############################################################################
+# Copyright (c) 2013-2016, Lawrence Livermore National Security, LLC.
+# Produced at the Lawrence Livermore National Laboratory.
+#
+# This file is part of Spack.
+# Created by Todd Gamblin, tgamblin@llnl.gov, All rights reserved.
+# LLNL-CODE-647188
+#
+# For details, see https://github.com/llnl/spack
+# Please also see the LICENSE file for our notice and the LGPL.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU Lesser General Public License (as
+# published by the Free Software Foundation) version 2.1, February 1999.
+#
+# This program is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
+# conditions of the GNU Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+##############################################################################
+from spack import *
+
+
+class PyTyping(PythonPackage):
+    """This is a backport of the standard library typing module to Python
+    versions older than 3.6."""
+
+    homepage = "https://docs.python.org/3/library/typing.html"
+    url      = "https://pypi.io/packages/source/t/typing/typing-3.6.1.tar.gz"
+
+    import_modules = ['typing']
+
+    version('3.6.1', '3fec97415bae6f742fb3c3013dedeb89')
+
+    # You need Python 2.7 or 3.3+ to install the typing package
+    depends_on('python@2.7:2.8,3.3:', type=('build', 'run'))