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<?php $r1 = '/(?!<r)rn/'; $r2 = '((?:rr(*SKIP)(*FAIL)|)rn)'; var_dump(preg_match($r1, "rn")); var_dump(preg_match($r2, "rn"));
Output for git.master, git.master_jit, rfc.property-hooks
int(1) int(1)

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