Re: change of git-diff-tree and symlinks

KS> If we introduce 'T', how is a content _and_ a type change represented KS> if they happen at the same time?

If you have this pair in two trees:

    ln -s frotz xyzzy
    echo -n frotz >xyzzy

it is a 'T'.  If you instead have these in two trees:

    ln -s rezrov xyzzy
    echo -n frotz >xyzzy

it is also a 'T'.

I do not think we would want patch format to give us a diff showing that string rezrov changing into frotz in the latter example anyway. When we have a type change, content change is irrelevant.