reenable GroupValued Int parsing
Don't try to parse Z^? as a polynomial functor with a single constant set by checking if Z is followed by ^,
in which case this Z is later parsed and accepted as a GroupValued Int.
closes #4 (closed)
Don't try to parse Z^? as a polynomial functor with a single constant set by checking if Z is followed by ^,
in which case this Z is later parsed and accepted as a GroupValued Int.
closes #4 (closed)