[tex-live] Ask tlmgr what the latest revision installed is

[Xu Wang]

Dear all,

How can I use tlmgr to basically tell me what the latest revision of
the packages I have installed is. I am not talking only about tlmgr
(which I can get with tlmgr --version), but of any LaTeX package. For
example, if I log this information, and if upgrading causes an error
for me, I can say "well, it worked with revision ABC".

Kind regards,

Xu