Details of incremental "z" changes to Lilypond

[Reg Ludions]

Hello list

is there a way to see the changes to Lilypond with each incremental development 
version (the "z"s in version "x.y.z"), as against the changes between "y" 
versions? I can't seem to locate this in the various versions of the docs - are 
details only (presumably) to be found in a change log in the full source code 
change log?

Regards

Tom