Test cccmd in t9001-send-email.sh and fix some bugs

Test cccmd in t9001-send-email.sh and fix some bugs

For another patch series I'm working on I needed some tests
for the cc-cmd feature of git-send-email.

This patch adds 3 tests for the feature and for the possibility
to specify --suppress-cc multiple times, and fixes two bugs.
The first bug is that the --suppress-cc option for `cccmd' was
misspelled as `ccmd' in the code.  The second bug, which is
actually found only with my other series, is that the argument
to the cccmd is never quoted, so the cccmd would fail with
patch file names containing a space.

A third bug I fix (in the docs) is that the bodycc argument was
actually spelled ccbody in the documentation and bash completion.

Signed-off-by: Paolo Bonzini <bonzini@gnu.org>
Cc: Markus Heidelberg <markus.heidelberg@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>