ENH: Improve clipboard

[bashtage]

Synchronize clipboard with upstream pandas

• Tests added: Please use assert_type() to assert the type of any return value

[bashtage]

Pretty hard to add tests for so nothing added so far.

[Dr-Irv]

Given that the kwargs are the same as read_csv for read_clipboard and the same as to_csv for to_clipboard, we should copy those arguments over to here, and remove the kwargs

For testing, you could do a to_clipboard followed by read_clipboard

[bashtage]

Clipboard testing doesn't work on linux CI without extra setup. Maintaining the CI setup is not worth it IMO. I will skip the test if the to_clipboard fails.

[bashtage]

Test added. It runs on windows but not linux.

[Dr-Irv]

Given that the kwargs are the same as read_csv for read_clipboard and the same as to_csv for to_clipboard, we should copy those arguments over to here, and remove the kwargs

@bashtage Do you think you could do this as well? No need to add a test for all the args, but you could copy them over.

[bashtage]

I've added the kwargs from read_csv - Warning: There are a lot. Turns out clipboard can also return a TextFileReader too.

[Dr-Irv]

thanks @bashtage