rustdoc: where-clauses on tuple & unit structs and on assoc tys are weirdly styled

[fmease]

The styling of where-clauses on tuple & unit structs and on assoc tys weirdly differs from those on other items (structs, enums, unions, functions, impl blocks etc.) in that they don't have a smaller fonts size and are indented by 9 instead of 4 spaces (more precisely: for associated types it's 3 instead of 4 inside the .item-decl of the trait but 9 instead of 4 everywhere else).

Tuple Structs

pub struct A<T>(T)
where
    T: Copy;

is rendered as

Compare that to

pub struct B<T>
where
    T: Copy,
{
    x: T,
}

Unit Structs

#![feature(trivial_bounds)]

pub struct S
where
    String: Clone;

Associated Types

pub struct S;

pub trait Tr {
    type F<T>
    where
        T: Clone;
}

impl Tr for S {
    type F<T> = T where T: Clone;
}

Inside the .item-decl of the trait (3 spaces, big):

In section Required Associated Types on the page of the trait (9 spaces):

On the implementer's page (9 spaces, big):

@rustbot label C-bug T-rustdoc A-rustdoc-ui

[GuillaumeGomez]

#112927 fixed all of them as far as I can see:

The remaining debate is about the 3 spaces rule which makes the reading easier but differs from rustfmt. You can see the debate in #113043.

[fmease]

#112927 did indeed mostly fix it. The one thing remaining though is the font size of the where-clause which #113043 fixes: Outside of .item-decl I expect them to be smaller compared to the corresponding item.

The where-clause being indented by 3 spaces inside of .item-decls has been FCP'ed as notriddle reminded me, so that's set in stone until someone raises a serious concern.