Fix Ty link (#1308)

Author: pierwill

src/appendix/code-index.md

@@ -28,7 +28,7 @@ Item            |  Kind    | Short description           | Chapter            |
 `rustc_ast::token_stream::TokenStream` | struct | An abstract sequence of tokens, organized into `TokenTree`s | [The parser], [Macro expansion] | [compiler/rustc_ast/src/tokenstream.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_ast/tokenstream/struct.TokenStream.html)
 `TraitDef` | struct | This struct contains a trait's definition with type information | [The `ty` modules] |  [compiler/rustc_middle/src/ty/trait_def.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/trait_def/struct.TraitDef.html)
 `TraitRef` | struct | The combination of a trait and its input types (e.g. `P0: Trait<P1...Pn>`) | [Trait Solving: Goals and Clauses]  |  [compiler/rustc_middle/src/ty/sty.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/struct.TraitRef.html)
-`Ty<'tcx>` | struct | This is the internal representation of a type used for type checking | [Type checking] | [compiler/rustc_middle/src/ty/mod.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/type.Ty.html)
+`Ty<'tcx>` | struct | This is the internal representation of a type used for type checking | [Type checking] | [compiler/rustc_middle/src/ty/mod.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/struct.Ty.html)
 `TyCtxt<'tcx>` | struct | The "typing context". This is the central data structure in the compiler. It is the context that you use to perform all manner of queries | [The `ty` modules] | [compiler/rustc_middle/src/ty/context.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/struct.TyCtxt.html)
 
 [The HIR]: ../hir.html

src/overview.md

@@ -289,7 +289,7 @@ on [`ty::Ty`][ty], but for now, we just want to mention that it exists and is th
 
 Also note that the `rustc_middle::ty` module defines the `TyCtxt` struct we mentioned before.
 
-[ty]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/type.Ty.html
+[ty]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/struct.Ty.html
 
 ### Parallelism
 

src/ty.md

@@ -16,7 +16,7 @@ The specific `Ty` we are referring to is [`rustc_middle::ty::Ty`][ty_ty] (and no
 [`rustc_hir::Ty`][hir_ty]). The distinction is important, so we will discuss it first before going
 into the details of `ty::Ty`.
 
-[ty_ty]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/type.Ty.html
+[ty_ty]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/struct.Ty.html
 [hir_ty]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/struct.Ty.html
 
 ## `rustc_hir::Ty` vs `ty::Ty`