journalctl: fix built-in usage output
This brings journalctl's built-in usage output in sync with the man page. There are no commands to pass, and the help screen should not confuse users.
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@ -50,7 +50,7 @@ static bool arg_local = false;
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static int help(void) {
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printf("%s [OPTIONS...] {COMMAND} ...\n\n"
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printf("%s [OPTIONS...] [MATCH]\n\n"
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"Send control commands to or query the journal.\n\n"
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" -h --help Show this help\n"
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" --version Show package version\n"
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