This should make things a little more robust in terms of user input;
before, even the program got it wrong by outputting a line with only
"GIT:", which was left in place as a header, because there would be
no following space character.
Signed-off-by: Michael Witten <mfwitten@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>