fix some links

src/doc/book/src/README.md

@@ -21,7 +21,6 @@ is the first. After this:
 * [Tutorial: Guessing Game][gg] - Learn some Rust with a small project.
 * [Syntax and Semantics][ss] - Each bit of Rust, broken down into small chunks.
 * [Effective Rust][er] - Higher-level concepts for writing excellent Rust code.
-* [Nightly Rust][nr] - Cutting-edge features that aren’t in stable builds yet.
 * [Glossary][gl] - A reference of terms used in the book.
 * [Bibliography][bi] - Background on Rust's influences, papers about Rust.
 
@@ -29,7 +28,6 @@ is the first. After this:
 [gg]: guessing-game.html
 [er]: effective-rust.html
 [ss]: syntax-and-semantics.html
-[nr]: nightly-rust.html
 [gl]: glossary.html
 [bi]: bibliography.html
 

src/doc/book/src/casting-between-types.md

@@ -151,12 +151,9 @@ elements of the array. These kinds of casts are very dangerous, because they
 make assumptions about the way that multiple underlying structures are
 implemented. For this, we need something more dangerous.
 
-The `transmute` function is provided by a [compiler intrinsic][intrinsics], and
-what it does is very simple, but very scary. It tells Rust to treat a value of
-one type as though it were another type. It does this regardless of the
-typechecking system, and completely trusts you.
-
-[intrinsics]: intrinsics.html
+The `transmute` function is very simple, but very scary. It tells Rust to treat
+a value of one type as though it were another type. It does this regardless of
+the typechecking system, and completely trusts you.
 
 In our previous example, we know that an array of four `u8`s represents a `u32`
 properly, and so we want to do the cast. Using `transmute` instead of `as`,

src/doc/book/src/conditional-compilation.md

@@ -79,8 +79,7 @@ Will be the same as `#[b]` if `a` is set by `cfg` attribute, and nothing otherwi
 
 # cfg!
 
-The `cfg!` [syntax extension][compilerplugins] lets you use these kinds of flags
-elsewhere in your code, too:
+The `cfg!` macro lets you use these kinds of flags elsewhere in your code, too:
 
 ```rust
 if cfg!(target_os = "macos") || cfg!(target_os = "ios") {
@@ -88,7 +87,5 @@ if cfg!(target_os = "macos") || cfg!(target_os = "ios") {
 }
 ```
 
-[compilerplugins]: compiler-plugins.html
-
 These will be replaced by a `true` or `false` at compile-time, depending on the
 configuration settings.

src/doc/book/src/macros.md

@@ -761,12 +761,3 @@ to typecheck, and don’t want to worry about writing out the body of the
 function. One example of this situation is implementing a trait with multiple
 required methods, where you want to tackle one at a time. Define the others
 as `unimplemented!` until you’re ready to write them.
-
-# Procedural macros
-
-If Rust’s macro system can’t do what you need, you may want to write a
-[compiler plugin](compiler-plugins.html) instead. Compared to `macro_rules!`
-macros, this is significantly more work, the interfaces are much less stable,
-and bugs can be much harder to track down. In exchange you get the
-flexibility of running arbitrary Rust code within the compiler. Syntax
-extension plugins are sometimes called ‘procedural macros’ for this reason.

src/doc/book/src/unsafe.md

@@ -139,4 +139,4 @@ I’ll repeat again: even though you _can_ do arbitrary things in unsafe blocks
 and functions doesn’t mean you should. The compiler will act as though you’re
 upholding its invariants, so be careful!
 
-[intrinsics]: intrinsics.html
+[intrinsics]: ../unstable-book/intrinsics.html

src/doc/book/src/using-rust-without-the-standard-library.md

@@ -9,7 +9,7 @@ don’t want to use the standard library via an attribute: `#![no_std]`.
 > Note: This feature is technically stable, but there are some caveats. For
 > one, you can build a `#![no_std]` _library_ on stable, but not a _binary_.
 > For details on binaries without the standard library, see [the nightly
-> chapter on `#![no_std]`](no-stdlib.html)
+> chapter on 'lang items'](../unstable-book/lang-items.html#using-libc)
 
 To use `#![no_std]`, add it to your crate root:
 

src/doc/unstable-book/src/alloc-jemalloc.md

@@ -4,7 +4,7 @@ The tracking issue for this feature is: [#33082]
 
 [#33082]: https://github.com/rust-lang/rust/issues/33082
 
-See also [`alloc_system`](alloc-system.md).
+See also [`alloc_system`](alloc-system.html).
 
 ------------------------
 

src/doc/unstable-book/src/alloc-system.md

@@ -4,7 +4,7 @@ The tracking issue for this feature is: [#33082]
 
 [#33082]: https://github.com/rust-lang/rust/issues/33082
 
-See also [`alloc_jemalloc`](alloc-jemalloc.md).
+See also [`alloc_jemalloc`](alloc-jemalloc.html).
 
 ------------------------
 

src/doc/unstable-book/src/plugin.md

@@ -39,7 +39,7 @@ of a library.
 
 Plugins can extend Rust's syntax in various ways. One kind of syntax extension
 is the procedural macro. These are invoked the same way as [ordinary
-macros](macros.html), but the expansion is performed by arbitrary Rust
+macros](../book/macros.html), but the expansion is performed by arbitrary Rust
 code that manipulates syntax trees at
 compile time.
 
@@ -137,7 +137,7 @@ enum.  For a more involved macro example, see
 
 ## Tips and tricks
 
-Some of the [macro debugging tips](macros.html#Debugging%20macro%20code) are applicable.
+Some of the [macro debugging tips](../book/macros.html#debugging-macro-code) are applicable.
 
 You can use `syntax::parse` to turn token trees into
 higher-level syntax elements like expressions: