Imported atoms break table view in evaluator

[Nuno Macedo]

The occurrence of atoms from imported modules in expressions seems to break the table view in the evaluator. Example, with sig Natural imported from util/natural:

open util/natural
some sig a { 
	r : Natural,
	s : a }
run {}

[Nuno Macedo]

It works fine on table view though:

[Nuno Macedo]

Fixed, was a problem with the regex identifying tuple sets to be converted into tables.