HeaderCommentFixer - Fix unexpected removal of regular comments

[julienfalque]

Fixes #4925.

[SpacePossum]

I think this will still remove the 2nd comment:

<?php

/*
 * foo
 */

declare(strict_types=1);

/* 2 */
foo();

[julienfalque]

Indeed. Also this was a bad fix. I tried a different approach, I think it's more robust and reliable, but it's also a small behavior change: now the comments that are not in the expected location will not be removed unless they have the exact same content as the header.

[cs278]

Resolves #4925 for me.

[SpacePossum]

Thank you @julienfalque.