Add some backticks to the rustc_middle::ty::adjustment::Adjustment …

…docs

A few `[i32]`s are getting picked up as intra-doc links, rather than showing as slices, making the sentence quite confusing.

compiler/rustc_middle/src/ty/adjustment.rs

@@ -47,7 +47,7 @@ pub enum PointerCast {
 /// 1. The simplest cases are where a pointer is not adjusted fat vs thin.
 ///    Here the pointer will be dereferenced N times (where a dereference can
 ///    happen to raw or borrowed pointers or any smart pointer which implements
-///    Deref, including Box<_>). The types of dereferences is given by
+///    `Deref`, including `Box<_>`). The types of dereferences is given by
 ///    `autoderefs`. It can then be auto-referenced zero or one times, indicated
 ///    by `autoref`, to either a raw or borrowed pointer. In these cases unsize is
 ///    `false`.
@@ -56,7 +56,7 @@ pub enum PointerCast {
 ///    with a thin pointer, deref a number of times, unsize the underlying data,
 ///    then autoref. The 'unsize' phase may change a fixed length array to a
 ///    dynamically sized one, a concrete object to a trait object, or statically
-///    sized struct to a dynamically sized one. E.g., &[i32; 4] -> &[i32] is
+///    sized struct to a dynamically sized one. E.g., `&[i32; 4]` -> `&[i32]` is
 ///    represented by:
 ///
 ///    ```
@@ -66,7 +66,7 @@ pub enum PointerCast {
 ///    ```
 ///
 ///    Note that for a struct, the 'deep' unsizing of the struct is not recorded.
-///    E.g., `struct Foo<T> { x: T }` we can coerce &Foo<[i32; 4]> to &Foo<[i32]>
+///    E.g., `struct Foo<T> { x: T }` we can coerce `&Foo<[i32; 4]>` to `&Foo<[i32]>`
 ///    The autoderef and -ref are the same as in the above example, but the type
 ///    stored in `unsize` is `Foo<[i32]>`, we don't store any further detail about
 ///    the underlying conversions from `[i32; 4]` to `[i32]`.
@@ -75,8 +75,8 @@ pub enum PointerCast {
 ///    that case, we have the pointer we need coming in, so there are no
 ///    autoderefs, and no autoref. Instead we just do the `Unsize` transformation.
 ///    At some point, of course, `Box` should move out of the compiler, in which
-///    case this is analogous to transforming a struct. E.g., Box<[i32; 4]> ->
-///    Box<[i32]> is an `Adjust::Unsize` with the target `Box<[i32]>`.
+///    case this is analogous to transforming a struct. E.g., `Box<[i32; 4]>` ->
+///    `Box<[i32]>` is an `Adjust::Unsize` with the target `Box<[i32]>`.
 #[derive(Clone, TyEncodable, TyDecodable, HashStable, TypeFoldable)]
 pub struct Adjustment<'tcx> {
     pub kind: Adjust<'tcx>,