Fail selftest if anything is written to stderr
-rw-r--r-- 299 .codespellrc
-rw-r--r-- 324 .gitignore
-rw-r--r-- 281 .yamllint
-rw-r--r-- 1275 LICENSE
-rw-r--r-- 2823 README
drwxr-xr-x - doc
drwxr-xr-x - etc
drwxr-xr-x - mudpy
drwxr-xr-x - sample
-rw-r--r-- 1853 setup.cfg
-rw-r--r-- 265 setup.py
drwxr-xr-x - share
-rw-r--r-- 4654 tox.ini