Remove -- as an alias for Term parser.

As per comment in release notes this has long been replaced as
appropriate style.

Use ternaryComparisons in src/fmapal instead of its own iso. type

Closes #343

Rework ring's prelim to be ternaryComparisons and moved to src/sort

Addressing github issue #343, which is to use one base comparison
result type for what happens in both src/ring and src/enumfset.