I know there are a few other places... maybe if you search for "*args, **kwargs" or something you'll find them..
Also you can add yourself to AUTHORS.rst if you want :)

Found some more, working on it.
Nevermind, I was in the wrong branch :D

Ok. There is more. Give me one or two days to look through the code, there are some files, I did not look at yet.

Ok, I'm done. I read through all the code and will go to bed now. That should really have been it now.

@saschalalala Good night :)

Okay, some tests fail because the MockBot also has to be reworked a little. However, I reread the contributing doc and set up my environment to run the tests locally before pushing the changes and I receive some other errors like ModuleNotFoundError: No module named 'telegram.vendor.ptb_urllib3.urllib3' Anything I can do about that?

@saschalalala make sure to read the installation instructions carefully. You did not pull the submodule. Easiest way to fix is running git submodule update --init --recursive

Okay, thanks. I overlooked that because I only read the contributing guide m(

The tests are running fine on my machine now.

@saschalalala thanks for pointing that out, we need to add this change in our contributing guide aswell.

Is there anything I can do regarding the two failed tests or are they related to the test environment and network issues?

Flake8...................................................................Failed
hookid: flake8
telegram/precheckoutquery.py:98:100: E501 line too long (101 > 99 characters)

this needs to be fixed, the timed out error is nothing to worry about.

This looks great, thank you for the effort!