Commented out test for Issue #24 for now.

Commented out until we're ready to fix it.
Don't raise strings (for #30); add unit tests.
Properly test for quotes in value.

I think the code was supposed to look for quotes of any kinds in
strings, so I fixed it to do that. With proper escaping, this shouldn't
be necessary—but I doubt that everything is escaped properly elsewhere
in CPA, so I'll keep this test for now.
Don't raise strings (for #30)
Don't raise strings. Resolves #30.

These fixes are without unit tests.