Rebuilding stuff for 1.6.2, I see that RubyUnit says it's a good idea to
have rdtool installed.  That says I need to install racc, strscan and
optparse.  optparse doesn't have an English Readme file as far as I can
see, and I cannot figure out how to install it.  But then, README.rd for
rdtool says:

> 
> In this case, OptionParser is also needed.
> 
> NOTE: I recommend to use Racc and strscan.
> 

so I'm not sure if I really need optparse, or are racc and stscan
sufficient?

	Hugh