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<?php var_dump("\x{}", "\xZZ", "\xg", "\u", "\u9999", "\u{9999}");
Output for git.master, git.master_jit, rfc.property-hooks
string(4) "\x{}" string(4) "\xZZ" string(3) "\xg" string(2) "\u" string(6) "\u9999" string(3) "香"

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