- Identifiers that are initialized with set()/table() constructor
expressions now inherit attributes from the expression. Before,
statements like
const i: set[string] = set() &redef;
associated the attribute with the set() constructor, but not the
"i" identifier, preventing redefinition. Addresses #866.
- Allow &default attribute to apply to tables initialized as empty
(via either "{ }" or "table()") or if the expression supplied to it
can evaluate to a type that's promotable to the same yield type as
the table.
