Equal Code and Concept overloads are inconsistent with Tuple equality semantics

[rob-reynolds]

No description provided.

[brynrhodes]

Specifically, the Equal(Code, Code) operator description says Code equality is defined using tuple semantics, but then says that the operator returns null if either argument is null, or has any null components. As of CQL 1.3, tuple equality semantics only return null if the values have different components specified.