python docs theme: new package at v2020.1 (#17627)

var/spack/repos/builtin/packages/py-python-docs-theme/package.py

+# Copyright 2013-2020 Lawrence Livermore National Security, LLC and other
+# Spack Project Developers. See the top-level COPYRIGHT file for details.
+#
+# SPDX-License-Identifier: (Apache-2.0 OR MIT)
+
+from spack import *
+
+
+class PyPythonDocsTheme(PythonPackage):
+    """This is the theme for the Python documentation.
+    """
+
+    homepage = "https://docs.python.org/3/"
+    url      = "https://pypi.io/packages/source/p/python-docs-theme/python-docs-theme-2018.7.tar.gz"
+
+    version('2020.1', sha256='29c33ba393bdb9377910116a0c1cc329573a4e040227c58a3293d27928d8262a')
+    version('2018.7', sha256='018a5bf2a7318c9c9a8346303dac8afc6bc212d92e86561c9b95a3372714155a')
+
+    depends_on('py-setuptools')