repl: parenthesised banged expressions are not evaluted

[stassa]

At the mettalog repl, when typing a "banged" s-expression between parentheses the s-expression should be evaluated as soon as the parentheses close. This is not the case currently, for example:

% repl started from Prolog shell in metta-wam/prolog/metta_lang with:
% swipl metta_interp.pl --prolog

2 ?- repl.
metta+>(
metta+>!(
metta+>+ 1 1
metta+>)
metta+>)
metta+>
metta+>
metta+>

After the outer ')' is entered the repl should evaluate the !(+ 1 1) but instead it hangs.

[TeamSPoon]

not to be too weird i almost think it would be nice if it acted like you had jsut entered

metta+> (2)

in this case