Upgrade from 4.1.5 to 4.1.6

Hi All,
My newyears resolution is to keep up with CI updates.
This will be my first manual upgrade and I would like to do it correct.
The upgrade page tells me that only these files are changed:

• Code:

  app/Config/Filters.php
• Code:

  app/Config/Mimes.php
• Code:

  app/Config/Security.php
• Code:

  app/Config/Toolbar.php
• Code:

  app/Views/errors/html/error_exception.php

But when I check system/CodeIgniter.php, there are changes as well (not only CI_VERSION).

I thought it was safe to just copy  the changed files, but I'm afraid I will miss out on other files.
I don't want to just copy paste everything, because my config folder contains some configs which should be reviewed manualy.
What's best practice in this situation?