Fix next()
Fix next()

+ and - are operators, and they must be operators since they
can be part of +=, -=, ++, -- tokens, so they are no a valid
part of a number.

8l/scc,k0gaMSX/kcc,k0gaMSX/kcc,8l/scc,k0gaMSX/scc,k0gaMSX/scc,8l/scc,k0gaMSX/scc