git-difftool: use git-mergetool--lib for "--tool-help"

[git/raj.git] / t / t5100 / msg0010

"Subject: " isn't in the static array "header", and thus
memcmp("Subject: ", header[i], 7) will never match.

Signed-off-by: Lukas Sandström <lukass@etek.chalmers.se>
Signed-off-by: Junio C Hamano <gitster@pobox.com>