[plt-scheme] v3.99 pattern matching (doc bug and feature request)

Two things:
1) I can't seem to find any indication of what happens when pattern matching
fails in the v3.99 reference manual.  That should be documented.
2) Could byte strings be added to the pattern matching syntax for literals,
alongside traditional strings?

- James Russell

-- 
"The most merciful thing in the world, I think, is the inability of
the human mind to correlate all its contents." -- H.P.Lovecraft