Deriving Bundle fails for nested bundles with generic parameters

[concave-sphere]

Bevy version

0.5

Operating system & version

Debian GNU/Linux "buster"

What you did

Tried to derive Bundle for a struct containing a type with generic parameters:

#[derive(Bundle)]
struct Bar<T: bevy::ecs::component::Component> {
    f: T,
}

#[derive(Bundle)]
struct Foo {
    #[bundle]
    bar: Bar<String>,
}

What you expected to happen

I should get a Bundle implementation for Foo that includes Bar as a sub-bundle.

What actually happened

The code produced by the macro fails to compile:

error: comparison operators cannot be chained
  --> src/main.rs:13:13
   |
13 |     bar: Bar<String>,
   |             ^      ^
   |
help: use `::<...>` instead of `<...>` to specify type or const arguments
   |
13 |     bar: Bar::<String>,
   |             ^^

error: proc-macro derive produced unparseable tokens
  --> src/main.rs:10:10
   |
10 | #[derive(Bundle)]
   |          ^^^^^^

error: aborting due to 2 previous errors

Additional information

Using a type alias is a workaround:

#[derive(Bundle)]
struct Bar<T: bevy::ecs::component::Component> {
    f: T,
}

type BarString = Bar<String>;

#[derive(Bundle)]
struct Foo {
    #[bundle]
    bar: BarString,
}

(edited to remove an unrelated bug from my example code and add the workaround)

[YohDeadfall]

While another issue awaits some clarification on change from Carter, I can take this one.