Hi all.

Some good and interesting library at rubyforge can be downloaded only as
*.gem

The question is: is there method for unpack library and view its source and
docs *without* installing it? 

I need such functionality very oftenly (in my local HDD repository there are
93 libraries I've downloaded to study their code and docs, and only ~10-20
of them I currently use; so I don't want unused libraries to be installed at
all).

Thanks.

Victor.