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<?php $matches = []; $str = 'foo\n```bar```'; preg_match('/(^|.*\s)```/mu', $str, $matches, PREG_OFFSET_CAPTURE, 0); var_dump($str); var_dump($matches);
Output for git.master, git.master_jit, rfc.property-hooks
string(14) "foo\n```bar```" array(0) { }

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