[R6RS] Hash table terminology consistency

[Anton van Straaten]

Michael Sperber wrote:
> The same thing happened with the lists library; you might want to
> refer to the wording there, which doesn't use the word "predicate."
> (I expected this to be awkward before I made the change, but it is
> really not.)

Thanks.  I guess I'll change the inspection procedure's name to 
hash-table-equivalence-procedure, then.

While looking at that, I noticed that the term "a true value" or "true 
values" is still used in some places in base.tex, list.tex, misclib.tex 
and setcar.tex, but the R6RS term for this is apparently "true".  (I 
must have missed the memo on that - I didn't notice it until Will said 
something yesterday.)

Anton