Fix magic methods detection

[fisker]

Input:

<?php
class Foo
{
    public function __pRoTo__() {}
    public function cOnStRuCtOr() {}
}

Output:

<?php
class Foo
{
    public function Have not implemented kind undefined yet.()
    {
    }
    public function Have not implemented kind undefined yet.()
    {
    }
}

[czosel]

Nice! 👍 IIRC, there is an open issue about this somewhere in our issue tracker 🙃