assertion support

[Tom Tromey]

>>>>> "Jeff" == Jeff Sturm <jsturm@one-point.com> writes:

Jeff> Note that rhug currently doesn't build because jython declares
Jeff> methods named "assert".

I didn't know that.  Thanks.

I think there are two good options:

* Change jython.  Long term this is best.

* Change gcj to have an option so that it doesn't recognize "assert"
  as a keyword (the JDK javac has this).  I think the code to do this
  would be pretty small, just a hack in lex.c (plus the command-line
  recognition and of course the documentation).

Care to submit a PR for this?

Tom