Constants -- an optional argument

Functions with optional argument named Constants:

• monoid(...,Constants=>...) -- see monoid(...,Join=>...) -- specify how to handle degrees in the coefficient ring
• newRing(...,Constants=>...) -- see newRing -- make a copy of a ring, with some features changed
• symmetricAlgebra(...,Constants=>...) -- see symmetricAlgebra -- the symmetric algebra of a module
• tensor(Monoid,Monoid,Constants=>...) -- see tensor(Monoid,Monoid) -- tensor product of monoids
• tensor(Ring,Ring,Constants=>...) -- see tensor(Monoid,Monoid) -- tensor product of monoids