git-blame: fix lapsus

Signed-off-by: Pierre Habouzit <madcoder@debian.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin-blame.c b/builtin-blame.c
index 99f5140..73d26c6 100644
--- a/builtin-blame.c
+++ b/builtin-blame.c
@@ -25,7 +25,7 @@
 static const char *blame_opt_usage[] = {
 	blame_usage,
 	"",
-	"[rev-opts] are documented in git-rev-parse(1)",
+	"[rev-opts] are documented in git-rev-list(1)",
 	NULL
 };