fetch: fix negotiate-only error message

The error message when invoking a negotiate-only fetch without providing
any tips incorrectly refers to a --negotiate-tip=* argument. Fix this to
use the actual argument, --negotiation-tip=*.

Signed-off-by: Robert Coup <robert@coup.net.nz>
Reviewed-by: Jonathan Tan <jonathantanmy@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/fetch.c

@@ -1991,7 +1991,7 @@ int cmd_fetch(int argc, const char **argv, const char *prefix)
 	}
 
 	if (negotiate_only && !negotiation_tip.nr)
-		die(_("--negotiate-only needs one or more --negotiate-tip=*"));
+		die(_("--negotiate-only needs one or more --negotiation-tip=*"));
 
 	if (deepen_relative) {
 		if (deepen_relative < 0)

t/t5702-protocol-v2.sh

@@ -606,7 +606,7 @@ test_expect_success 'usage: --negotiate-only without --negotiation-tip' '
 	setup_negotiate_only "$SERVER" "$URI" &&
 
 	cat >err.expect <<-\EOF &&
-	fatal: --negotiate-only needs one or more --negotiate-tip=*
+	fatal: --negotiate-only needs one or more --negotiation-tip=*
 	EOF
 
 	test_must_fail git -c protocol.version=2 -C client fetch \