[Oberon] Oberon filenames

[Douglas G. Danforth]

Treutwein Bernhard wrote:
> 
> > Pardon my "newbie" question here but what is there about "DUG_IDE.C"
> > that Oberon finds problematic as a filename?
> 
> the underscore !

BlackBox very nicely solves this problem by allowing underscore
to be a valid character for identifiers (and names).  Makes converting
from C to Component Pascal much nicer.

-Doug