When looking at rustdoc for items with multiple attributes, atributes are shown on the same line, rather than multiple. I don't have a code fragment, as I've only seen this appear in std documentation.

For example, see the MaybeUninit docs: https://doc.rust-lang.org/1.44.0/std/mem/union.MaybeUninit.html and expand the declaration.

I expected to see something like

#[lang = "maybe_uninit"]
#[repr(transparent)]
pub union MaybeUninit<T> {
    // some fields omitted
}

Instead, I see:

#[lang = "maybe_uninit"]#[repr(transparent)]
pub union MaybeUninit<T> {
    // some fields omitted
}

This occurs for both rust 1.44.0 and current nightly (unsure of exact nightly version, as looking at std nightly docs, not local docs).