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<?php $string = <<<STRING February 2009 bla bla March 2009 doo daa bla lbla Septemer 2009 STRING; var_export( preg_split('~\R{2}(?=[A-Z][a-z]+ \d{4}$)~m', $string, 0, PREG_SPLIT_NO_EMPTY) );
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 'February 2009 bla bla', 1 => 'March 2009 doo daa bla lbla', 2 => 'Septemer 2009', )

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