Deprecate Tidy without using `logging`.
Deprecate Tidy without using `logging`.

Apparently `logging` would require some configs at least with Python
2. Easier and safer to use write the message to stderr ourselves.

robotframework/robotframework,HelioGuilherme66/robotframework,robotframework/robotframework,robotframework/robotframework,HelioGuilherme66/robotframework,HelioGuilherme66/robotframework