Comment 3 for bug 1923076

Attached is a list of uses of scalar() that we should check, some definitely and some maybe. Since array refs don't seem to suffer this issue, I listed them but we may decide not to care.

I've excluded uses that are only used in truthiness tests (if, unless, while, ?:, etc), that are added to strings (log messages, concatenation to a string for return to the caller, etc), that are definitely not used in JSON (building HTML/XML, EDI messages, SQL, etc) or where I know for certain that the value is only used internally as a cache so we don't have to call scalar() over and over.