git send-email Cc with cruft not working as expected

[Jacob Keller <jacob.keller@gmail.com>]

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