If there are foreign $Id$ keywords in the repository, they are most
likely there for a reason. Let's keep them on checkout (which is also
what the documentation indicates). Foreign $Id$ keywords are now
recognized by there being multiple space separated fields in $Id:xxxxx$.
Signed-off-by: NHenrik Grubbström <grubba@grubba.org>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>