Users might want to filter incoming updates based on the file endings on top of/instead of the mime type. Both attributes of documents are not safe, but that didn't stop us from introducing a mime type want and shouldn't stop us from a file ending one either. Both are a great way of initially filtering incoming files. We should just mention in the docs, as we do with mime types, that telegram does

As the title says.

bot_in_a_guild() should also get imported from commands in checks to avoid breakage

Hello!
Thanks for awesome library.

I am trying to write tests for my bot, and not sure how to do it right. I've searched the docs but found nothing.

Do you have some examples?