I’d like to upgrade a 7.9.1 to 7.10 and later.
For some modules, there are some changes in PHP and templates / JS and I’m wondering how to find them.
I’ve downloaded the live version and ran a diff over all folders with the 7.9.1 from the official downloads.
There are 427 files in the modules folder alone (many are languages - 2 additional languages are installed on the live version).
How can I find the files that have actual custom code inside?
(No documentation or similar - but at least in the invoices are product images in the line items, so there are differences)