Description:
------------
ucwords() fails to change the first char of a word to uppercase when word is preceded by vertical tab(\v) or formfeed(\f). As per the documentation at http://in.php.net/manual/en/function.ucwords.php it should change the first char to uppercase. 

This is applicable to php5 as well as php6

Reproduce code:
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<?php
  $str = "testing \vucw\ford \vfunc\vtion";
  var_dump( ucwords($str) );
?>

Expected result:
----------------
char preceded with \v and \f should be changed to uppercase.

Actual result:
--------------
string(31) "Testing \vucw\ford \vfunc\vtion"