Block comments must be preceded by non-word character

[cgay]

The majority of sources/lib/big-integers/double-integer.dylan appears to be commented out because it uses dylan/* as the name for * imported from the dylan module.

(This is obviously low priority.)

[cgay]

It also causes problems whenever a module is imported with prefix: "foo/" and one has to, say, rebind a global variable with dynamic-bind (foo/*variable* = ...).