Compare versions functionality doesn't output diff text between different versions of an object as expected by user.
Sometimes it doesn't output the whole paragraph in diff (but you will be able to see this paragraph in view mode of an object)

Steps to reproduce

Just install attached package with object and you will see inconsistency of output text between diff and view mode of an object.
You need to compare using "Compare versions" next to last and last versions of the "ez publish" article( from attached package)