enums in binary templates are documented to support trailing comma, but don't actually support that

[wilcoxjay]

The first example of an enum in a binary template from the manual is

enum simple_enum_type
{
    ENUM_ONE,
    ENUM_TWO,
    ENUM_THREE,
};

with a trailing comma after ENUM_THREE, but I couldn't get this to work. I get a parse error at the close brace.

[solemnwarning]

Thanks for pointing that out! Fixed.