NonPrintableCharacterFixer - fix for when removing non-printable character break PHP syntax

[kubawerlos]

Apparently it is possible to use zero-width space and non-breaking space in such way that removing them (NonPrintableCharacterFixer replaces non-breaking space with normal space) breaks PHP syntax:

<?php
/* Hello *<zero-width space here>/ World! */
$foo<non-breaking space here>bar = true;

Should we use ultimate solution here and check if removing non-printable character breaks PHP syntax or have fun with tokens and comment's content (if that's even possible, I've found these 2 cases, could be more)?

[coveralls]

Coverage increased (+0.002%) to 93.033% when pulling 940690d on werlos:fix_NonPrintableCharacterFixer into 56d8399 on FriendsOfPHP:master.

[SpacePossum]

Thank you @kubawerlos.