git send-email Cc with cruft not working as expected

Hi,

I recently found an issue with git-send-email where it does not properly remove the cruft of an email address when sending using a Cc: line.

The specific example is with a commit containing the following Cc line,

Cc: stable@vger.kernel.org # 4.10+

which is the standard way Linux upstream expects the stable Ccs to be, and I saw several examples of this in the past.

However, this gets converted into a cc of "stable@vger.kernel.org#4.10+" which isn't a valid address obviously.

This does work as expected if you remember to

Cc: <stable@vger.kernel.org> # 4.10+

I would have assumed that validate_address would kick in and let me know that the address I'd given isn't valid, or something along those lines.

I tried to come up with a test for this, but modifying t9001 seemed to cause other failures and I couldn't detangle exactly how the tests fit together.

Is this simply expected behavior and I need to remember to use <> around the address?

Thanks, Jake