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<?php $out = []; $in = [5]; $out[] = $in; $in = [6]; $out[] = $in; $in = [7]; var_export($out); var_export($in);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 0 => 5, ), 1 => array ( 0 => 6, ), )array ( 0 => 7, )

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