pretty: factor out format_subject()
pretty: factor out format_subject()

The next patch will use it.

In the version that was factored out, we can't rely on the len of the
struct strbuf to find out if a line separator needs to be added, as
it might already contain something.  Add a guard variable ("first")
instead.

Signed-off-by: Rene Scharfe <5c721353370dda279bee7751cb8d3ff68ef77242@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git