gets ambiguity and enum suggestion

[Smelly Pooh <plop+goo@xxxxxxxxxxxxxxx>]

Version .146

The gets method returns an empty string "" whether we're at EOF or
reading an empty line, peek never seems to return EOF and I don't want
to mix get with gets calls.

There also seems to be a bug when calling peek just before and after EOF
is returned by get.  Each time peek is called #\ is returned, then
calling get on the port also returns #\ instead of EOF

On the topic of the enum method, can it be made to be more generic than
taking <col> as its first argument?  That would allow types such as
<port> to work with the enum protocol, and simplify cases where people
want to create enums, but not necessarily a full fledged collection