Reduce translations by using same terminologies

Somewhere in help usage, we use both "message" and "msg", "command"
and "cmd", "key id" and "key-id". This patch makes all help text from
parseopt use the first form. Clearer and 3 fewer strings for
translators.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

archive.c

@@ -343,7 +343,7 @@ static int parse_archive_args(int argc, const char **argv,
 		OPT_GROUP(""),
 		OPT_STRING(0, "remote", &remote, N_("repo"),
 			N_("retrieve the archive from remote repository <repo>")),
-		OPT_STRING(0, "exec", &exec, N_("cmd"),
+		OPT_STRING(0, "exec", &exec, N_("command"),
 			N_("path to the remote git-upload-archive command")),
 		OPT_END()
 	};

builtin/archive.c

@@ -92,7 +92,7 @@ int cmd_archive(int argc, const char **argv, const char *prefix)
 			N_("write the archive to this file")),
 		OPT_STRING(0, "remote", &remote, N_("repo"),
 			N_("retrieve the archive from remote repository <repo>")),
-		OPT_STRING(0, "exec", &exec, N_("cmd"),
+		OPT_STRING(0, "exec", &exec, N_("command"),
 			N_("path to the remote git-upload-archive command")),
 		OPT_END()
 	};

builtin/notes.c

@@ -531,7 +531,7 @@ static int add(int argc, const char **argv, const char *prefix)
 	const unsigned char *note;
 	struct msg_arg msg = { 0, 0, STRBUF_INIT };
 	struct option options[] = {
-		{ OPTION_CALLBACK, 'm', "message", &msg, N_("msg"),
+		{ OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 			N_("note contents as a string"), PARSE_OPT_NONEG,
 			parse_msg_arg},
 		{ OPTION_CALLBACK, 'F', "file", &msg, N_("file"),
@@ -688,7 +688,7 @@ static int append_edit(int argc, const char **argv, const char *prefix)
 	const char * const *usage;
 	struct msg_arg msg = { 0, 0, STRBUF_INIT };
 	struct option options[] = {
-		{ OPTION_CALLBACK, 'm', "message", &msg, N_("msg"),
+		{ OPTION_CALLBACK, 'm', "message", &msg, N_("message"),
 			N_("note contents as a string"), PARSE_OPT_NONEG,
 			parse_msg_arg},
 		{ OPTION_CALLBACK, 'F', "file", &msg, N_("file"),

builtin/tag.c

@@ -460,7 +460,7 @@ int cmd_tag(int argc, const char **argv, const char *prefix)
 		OPT_BOOLEAN('s', "sign", &opt.sign, N_("annotated and GPG-signed tag")),
 		OPT_STRING(0, "cleanup", &cleanup_arg, N_("mode"),
 			N_("how to strip spaces and #comments from message")),
-		OPT_STRING('u', "local-user", &keyid, N_("key-id"),
+		OPT_STRING('u', "local-user", &keyid, N_("key id"),
 					N_("use another key to sign the tag")),
 		OPT__FORCE(&force, N_("replace the tag if exists")),
 		OPT_COLUMN(0, "column", &colopts, N_("show tag list in columns")),