How do I apply patches in general? I read something about diff-files,
git, patch, frozen ruby, etc., but I don’t understand the procedure. I
would be very pleased, if you could help me.
Well for starters it’s probably a good idea to have rails frozen in
your app’s vendor/rails.
The patch file is just a diff between the original and the new version
(ie a list of changes to make).
Typically you download the diff file from trac (if there is more than
one attachment you’ll just have to figure out whether one of the
supersedes all others)
if you cd to vendor/rails you can then do something like