Move sphinxext test to matplotlib.tests like everyone else.

It doesn't really make sense to have a separate subpackage just for a
single test (compare e.g. with test_triangulation which also lives
there, even though matplotlib.tri is its own subpckage, or the various
backend-specific tests).

Author: anntzer

lib/matplotlib/sphinxext/tests/__init__.py

@@ -586,13 +586,11 @@ def get_package_data(self):
         return {
             'matplotlib': [
                 *_pkg_data_helper('matplotlib', 'tests/baseline_images'),
+                *_pkg_data_helper('matplotlib', 'tests/tinypages'),
                 'tests/cmr10.pfb',
                 'tests/mpltest.ttf',
                 'tests/test_rcparams.rc',
                 'tests/test_utf32_be_rcparams.rc',
-                'sphinxext/tests/tinypages/*.rst',
-                'sphinxext/tests/tinypages/*.py',
-                'sphinxext/tests/tinypages/_static/*',
             ],
             'mpl_toolkits': [
                 *_pkg_data_helper('mpl_toolkits', 'tests/baseline_images'),