clarity

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@330043 c90b9560-bf6c-de11-be94-00142212c4b1
tidy wording

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@330044 c90b9560-bf6c-de11-be94-00142212c4b1