Missing comma after `${vdefbody}` for braced variant

According to the reference, for a braced variant ${vdefbody VNAME FIELDS} produces VNAME { FIELDS }.

This is incorrect; there should be a comma after it. (When you're defining an enum, you need a comma after each variant.)

Example:

pub use derive_deftly;
use derive_deftly::{define_derive_deftly,Deftly};

define_derive_deftly! {
    pub Copied =

    // (This is copied from the reference)
    $tvis $tdefkwd $<$tname Copy><$tdefgens>
    ${tdefvariants $(
	${vdefbody $<$vname Copy> $(
            $fdefvis ${fdefine $<$fname _copy>} $ftype,
	) }
    ) }
}

// This compiles happily, since B is the last variant.
#[derive(Deftly)]
#[derive_deftly(Copied)]
pub enum MyEnum1 {
    A,
    B { x: u32 },
}

// This does not compile, since there is a missing comma after B.
#[derive(Deftly)]
#[derive_deftly(Copied)]
pub enum MyEnum2 {
    B { x: u32 },
    A,
}