Replace deprecated dashed git commands in usage

Signed-off-by: Alexander Potashev <aspotashev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/mktree.c b/mktree.c
index 6283bc3d4..137a0950f 100644
--- a/mktree.c
+++ b/mktree.c
@@ -62,7 +62,7 @@ static void write_tree(unsigned char *sha1)
 	write_sha1_file(buf.buf, buf.len, tree_type, sha1);
 }
 
-static const char mktree_usage[] = "git-mktree [-z]";
+static const char mktree_usage[] = "git mktree [-z]";
 
 int main(int ac, char **av)
 {