Upgrading from 4.2.5 to 4.2.6
Please refer to the upgrade instructions corresponding to your installation method.
A few files in the project space (root, app, public, writable) received cosmetic updates. You need not touch these files at all. There are some third-party CodeIgniter modules available to assist with merging changes to the project space: Explore on Packagist.
This is a list of all files in the project space that received changes; many will be simple comments or formatting that have no effect on the runtime: