pytest: add __init__ files for all test subdirs (#13889)

* pytest: add __init__ files for all test subdirs

* add licenses to empty files

* Fix Sphinx warning message about comment within docstring

* Further fixes to Sphinx docstring

lib/spack/spack/test/cmd/__init__.py

@@ -0,0 +1,4 @@
+# Copyright 2013-2019 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)

lib/spack/spack/test/cmd/env.py

@@ -786,12 +786,12 @@ def noop(*args):
 @pytest.mark.usefixtures('config')
 def test_store_different_build_deps():
     r"""Ensure that an environment can store two instances of a build-only
-Dependency:
+    dependency::
 
               x       y
              /| (l)   | (b)
         (b) | y       z2
-       \| (b)              # noqa: W605
+             \| (b)
               z1
 
     """

lib/spack/spack/test/llnl/util/__init.py

@@ -0,0 +1,4 @@
+# Copyright 2013-2019 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)

lib/spack/spack/test/modules/__init__.py

@@ -0,0 +1,4 @@
+# Copyright 2013-2019 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)

lib/spack/spack/test/util/__init__.py

@@ -0,0 +1,4 @@
+# Copyright 2013-2019 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)