[Doctests] Fix ignore bug and add more doc tests (#15911)
* finish speech doc tests
* finish
* boom
* Update src/transformers/models/speech_to_text/modeling_speech_to_text.py
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>
