Fix some broken links

Signed-off-by: Emmet Horgan <[email protected]>

Author: Emmet Horgan

src/doc/rustc-dev-guide/src/appendix/code-index.md

@@ -13,7 +13,7 @@ Item            |  Kind    | Short description           | Chapter            |
 `DefId` | struct | One of four types of HIR node identifiers | [Identifiers in the HIR] | [compiler/rustc_hir/src/def_id.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/def_id/struct.DefId.html)
 `Diag` | struct | A struct for a compiler diagnostic, such as an error or lint | [Emitting Diagnostics] | [compiler/rustc_errors/src/diagnostic.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_errors/struct.Diag.html)
 `DocContext` | struct | A state container used by rustdoc when crawling through a crate to gather its documentation | [Rustdoc] | [src/librustdoc/core.rs](https://github.com/rust-lang/rust/blob/master/src/librustdoc/core.rs)
-`HirId` | struct | One of four types of HIR node identifiers | [Identifiers in the HIR] | [compiler/rustc_hir/src/hir_id.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/hir_id/struct.HirId.html)
+`HirId` | struct | One of four types of HIR node identifiers | [Identifiers in the HIR] | [compiler/rustc_hir/src/hir_id.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/struct.HirId.html)
 `Lexer` | struct | This is the lexer used during parsing. It consumes characters from the raw source code being compiled and produces a series of tokens for use by the rest of the parser | [The parser] |  [compiler/rustc_parse/src/lexer/mod.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_parse/lexer/struct.Lexer.html)
 `NodeId` | struct | One of four types of HIR node identifiers. Being phased out | [Identifiers in the HIR] | [compiler/rustc_ast/src/ast.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_ast/node_id/struct.NodeId.html)
 `P` | struct | An owned immutable smart pointer. By contrast, `&T` is not owned, and `Box<T>` is not immutable. | None | [compiler/rustc_ast/src/ptr.rs](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_ast/ptr/struct.P.html)

src/doc/rustc-dev-guide/src/compiler-debugging.md

@@ -367,7 +367,7 @@ error: layout_of(&'a u32) = Layout {
 error: aborting due to previous error
 ```
 
-[`Layout`]: https://doc.rust-lang.org/nightly/nightly-rustc/stable_mir/abi/struct.Layout.html
+[`Layout`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_abi/struct.Layout.html
 
 
 ## Configuring CodeLLDB for debugging `rustc`

src/doc/rustc-dev-guide/src/hir.md

@@ -102,7 +102,7 @@ These identifiers can be converted into one another through the `TyCtxt`.
 
 [`DefId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/def_id/struct.DefId.html
 [`LocalDefId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/def_id/struct.LocalDefId.html
-[`HirId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/hir_id/struct.HirId.html
+[`HirId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/struct.HirId.html
 [`BodyId`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/hir/struct.BodyId.html
 [Node]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/hir/enum.Node.html
 [`CrateNum`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_hir/def_id/struct.CrateNum.html

src/doc/rustc-dev-guide/src/serialization.md

@@ -106,7 +106,7 @@ type wrapper, like [`ty::Predicate`] and manually implementing `Encodable` and
 [`Encodable`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_serialize/trait.Encodable.html
 [`Encoder`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_serialize/trait.Encoder.html
 [`RefDecodable`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/codec/trait.RefDecodable.html
-[`rustc_middle`]: https://doc.rust-lang.org/nightly/nightly-rustc/src/rustc_type_ir/codec.rs.html#21
+[`rustc_middle`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/index.html
 [`ty::Predicate`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/predicate/struct.Predicate.html
 [`TyCtxt`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_middle/ty/struct.TyCtxt.html
 [`TyDecodable`]: https://doc.rust-lang.org/nightly/nightly-rustc/rustc_macros/derive.TyDecodable.html

src/doc/rustc-dev-guide/src/tests/directives.md

@@ -38,7 +38,7 @@ sections that describe the command in more detail if available. This list may
 not be exhaustive. Directives can generally be found by browsing the
 `TestProps` structure found in [`header.rs`] from the compiletest source.
 
-[`header.rs`]: https://github.com/rust-lang/rust/tree/master/src/tools/compiletest/src/header.rs
+[`header.rs`]: https://github.com/rust-lang/rust/tree/master/src/tools/compiletest/src/directives.rs
 
 ### Assembly
 
@@ -374,7 +374,7 @@ the directive's backing store (holds the command's current value) at runtime.
 To add a new directive property:
 
 1. Look for the `pub struct TestProps` declaration in
-   [`src/tools/compiletest/src/header.rs`] and add the new public property to
+   [`src/tools/compiletest/src/directives.rs`] and add the new public property to
    the end of the declaration.
 2. Look for the `impl TestProps` implementation block immediately following the
    struct declaration and initialize the new property to its default value.
@@ -383,7 +383,7 @@ To add a new directive property:
 
 When `compiletest` encounters a test file, it parses the file a line at a time
 by calling every parser defined in the `Config` struct's implementation block,
-also in [`src/tools/compiletest/src/header.rs`] (note that the `Config` struct's
+also in [`src/tools/compiletest/src/directives.rs`] (note that the `Config` struct's
 declaration block is found in [`src/tools/compiletest/src/common.rs`]).
 `TestProps`'s `load_from()` method will try passing the current line of text to
 each parser, which, in turn typically checks to see if the line begins with a
@@ -406,7 +406,7 @@ and their associated parsers immediately above to see how they are used to avoid
 writing additional parsing code unnecessarily.
 
 As a concrete example, here is the implementation for the
-`parse_failure_status()` parser, in [`src/tools/compiletest/src/header.rs`]:
+`parse_failure_status()` parser, in [`src/tools/compiletest/src/directives.rs`]:
 
 ```diff
 @@ -232,6 +232,7 @@ pub struct TestProps {
@@ -508,6 +508,6 @@ example, `//@ failure-status: 1`, `self.props.failure_status` will evaluate to
 1, as `parse_failure_status()` will have overridden the `TestProps` default
 value, for that test specifically.
 
-[`src/tools/compiletest/src/header.rs`]: https://github.com/rust-lang/rust/tree/master/src/tools/compiletest/src/header.rs
+[`src/tools/compiletest/src/directives.rs`]: https://github.com/rust-lang/rust/tree/master/src/tools/compiletest/src/directives.rs
 [`src/tools/compiletest/src/common.rs`]: https://github.com/rust-lang/rust/tree/master/src/tools/compiletest/src/common.rs
 [`src/tools/compiletest/src/runtest.rs`]: https://github.com/rust-lang/rust/tree/master/src/tools/compiletest/src/runtest.rs