interpret-trailers: use placeholder instead of *

Use `<key-alias>` instead of `*` in order to be consistent with
the documentation.

Signed-off-by: Kristoffer Haugsbakk <code@khaugsbakk.name>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Author: LemmingAvalanche

builtin/interpret-trailers.c

@@ -211,7 +211,7 @@ int cmd_interpret_trailers(int argc,
 			     N_("action if trailer is missing"), option_parse_if_missing),
 
 		OPT_BOOL(0, "only-trailers", &opts.only_trailers, N_("output only the trailers")),
-		OPT_BOOL(0, "only-input", &opts.only_input, N_("do not apply trailer.* configuration variables")),
+		OPT_BOOL(0, "only-input", &opts.only_input, N_("do not apply trailer.<key-alias> configuration variables")),
 		OPT_BOOL(0, "unfold", &opts.unfold, N_("reformat multiline trailer values as single-line values")),
 		OPT_CALLBACK_F(0, "parse", &opts, NULL, N_("alias for --only-trailers --only-input --unfold"),
 			PARSE_OPT_NOARG | PARSE_OPT_NONEG, parse_opt_parse),