PHP Code and Code Style cleanup.

I assume that we are now in code cleanup phase. I use PhpStorm to find possible bugs and problems in the Drupal 8 core. Normally I will not alter code flow. If I find problems in a file, which I will not fix, but find suspicious. I'll mention it in the text here.

And also, this is my first patch to the D8 core. So bare with me if I do something not as expected.

Checked: utility.inc file.