These two type names are long and have long matching prefixes. I find
them hard to read, especially in combinations like
`AttrAnnotatedTokenStream::new(vec![AttrAnnotatedTokenTree::Token(..)])`.

This commit renames them as `AttrToken{Stream,Tree}`.

The `AttrTokenStream` is always immediately turned into a `TokenStream`.

`To` is better than `Create` for indicating that this is a non-consuming
conversion, rather than creating something out of nothing.

And the addition of `Attr` is because the current names makes them sound
like they relate to `TokenStream`, but really they relate to
`AttrTokenStream`.

This fixes the typo `&[u8, _]` -> `&[u8; _]`

These two elements are always nested below `<nav class="sidebar">`, and will
inherit the font from their parent.

These selectors were added in 93520d2, and
became redundant in 07e3f99 when the source
sidebar elements became nested below `nav.sidebar`.

…rochenkov

Streamline `AttrAnnotatedTokenStream`

r? ``@petrochenkov``

…-obk

Avoid `Iterator::last`

Adapters like `Filter` and `Map` use the default implementation of `Iterator::last` which is not short-circuiting (and so does `core::str::Split`). The predicate function will be run for every single item of the underlying iterator. I hope that removing those calls to `last` results in slight performance improvements.

…avidtwco

A `SubstitutionPart` is not considered a deletion if it replaces nothing with nothing

Fixes rust-lang#101689

Fix typo in concat_bytes documentation

This fixes the typo `&[u8, _]` -> `&[u8; _]`

…-sidebar-toggle, r=GuillaumeGomez

rustdoc: remove redundant CSS `#source-sidebar, #sidebar-toggle`

These two elements are always nested below `<nav class="sidebar">`, and will inherit the font from their parent.

These selectors were added in 93520d2, and became redundant in 07e3f99 when the source sidebar elements became nested below `nav.sidebar`.