Rustdoc incorrectly shows blanket impls with Send contraints on !Send types

[maan2003]

impl<T: Send + ..> ToSendValue for T is in Blanket impls

but the type is !Send

[GuillaumeGomez]

Minimum case to reproduce:

pub struct Foo(*const i8);

pub trait Whatever: Send {}

impl<T: Send + ?Sized> Whatever for T {}