https://github.com/trentm/python-markdown2/pull/682

--- markdown2-2.5.5/setup.py.orig
+++ markdown2-2.5.5/setup.py
@@ -49,7 +49,6 @@
     platforms=["any"],
     py_modules=["markdown2"],
     package_dir={"": "lib"},
-    data_files=[("testing", ["tox.ini"])],
     entry_points={
         "console_scripts": [
             "markdown2 = markdown2:main"