Fix up various links

The unstable book, libstd, libcore, and liballoc all needed some
adjustment.

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

@@ -137,7 +137,7 @@ of extensions.  See `Registry::register_syntax_extension` and the
 
 ## Tips and tricks
 
-Some of the [macro debugging tips](../book/macros.html#debugging-macro-code) are applicable.
+Some of the [macro debugging tips](../book/first-edition/macros.html#debugging-macro-code) are applicable.
 
 You can use `syntax::parse` to turn token trees into
 higher-level syntax elements like expressions:

src/liballoc/arc.rs

@@ -102,7 +102,7 @@ const MAX_REFCOUNT: usize = (isize::MAX) as usize;
 /// [downgrade]: struct.Arc.html#method.downgrade
 /// [upgrade]: struct.Weak.html#method.upgrade
 /// [`None`]: ../../std/option/enum.Option.html#variant.None
-/// [assoc]: ../../book/method-syntax.html#associated-functions
+/// [assoc]: ../../book/first-edition/method-syntax.html#associated-functions
 ///
 /// # Examples
 ///

src/liballoc/rc.rs

@@ -215,7 +215,7 @@
 //! [downgrade]: struct.Rc.html#method.downgrade
 //! [upgrade]: struct.Weak.html#method.upgrade
 //! [`None`]: ../../std/option/enum.Option.html#variant.None
-//! [assoc]: ../../book/method-syntax.html#associated-functions
+//! [assoc]: ../../book/first-edition/method-syntax.html#associated-functions
 //! [mutability]: ../../std/cell/index.html#introducing-mutability-inside-of-something-immutable
 
 #![stable(feature = "rust1", since = "1.0.0")]

src/libcore/char.rs

@@ -94,7 +94,7 @@ pub const MAX: char = '\u{10ffff}';
 ///
 /// [`char`]: ../../std/primitive.char.html
 /// [`u32`]: ../../std/primitive.u32.html
-/// [`as`]: ../../book/casting-between-types.html#as
+/// [`as`]: ../../book/first-edition/casting-between-types.html#as
 ///
 /// For an unsafe version of this function which ignores these checks, see
 /// [`from_u32_unchecked`].
@@ -146,7 +146,7 @@ pub fn from_u32(i: u32) -> Option<char> {
 ///
 /// [`char`]: ../../std/primitive.char.html
 /// [`u32`]: ../../std/primitive.u32.html
-/// [`as`]: ../../book/casting-between-types.html#as
+/// [`as`]: ../../book/first-edition/casting-between-types.html#as
 ///
 /// # Safety
 ///

src/libcore/iter/iterator.rs

@@ -409,7 +409,7 @@ pub trait Iterator {
     /// If you're doing some sort of looping for a side effect, it's considered
     /// more idiomatic to use [`for`] than `map()`.
     ///
-    /// [`for`]: ../../book/loops.html#for
+    /// [`for`]: ../../book/first-edition/loops.html#for
     ///
     /// # Examples
     ///
@@ -1306,7 +1306,7 @@ pub trait Iterator {
     /// use a `for` loop with a list of things to build up a result. Those
     /// can be turned into `fold()`s:
     ///
-    /// [`for`]: ../../book/loops.html#for
+    /// [`for`]: ../../book/first-edition/loops.html#for
     ///
     /// ```
     /// let numbers = [1, 2, 3, 4, 5];

src/libcore/mem.rs

@@ -164,7 +164,7 @@ pub use intrinsics::transmute;
 /// [uninit]: fn.uninitialized.html
 /// [clone]: ../clone/trait.Clone.html
 /// [swap]: fn.swap.html
-/// [FFI]: ../../book/ffi.html
+/// [FFI]: ../../book/first-edition/ffi.html
 /// [box]: ../../std/boxed/struct.Box.html
 /// [into_raw]: ../../std/boxed/struct.Box.html#method.into_raw
 /// [ub]: ../../reference/behavior-considered-undefined.html
@@ -199,7 +199,7 @@ pub fn size_of<T>() -> usize {
 /// then `size_of_val` can be used to get the dynamically-known size.
 ///
 /// [slice]: ../../std/primitive.slice.html
-/// [trait object]: ../../book/trait-objects.html
+/// [trait object]: ../../book/first-edition/trait-objects.html
 ///
 /// # Examples
 ///
@@ -317,7 +317,7 @@ pub fn align_of_val<T: ?Sized>(val: &T) -> usize {
 /// many of the same caveats.
 ///
 /// [uninit]: fn.uninitialized.html
-/// [FFI]: ../../book/ffi.html
+/// [FFI]: ../../book/first-edition/ffi.html
 /// [ub]: ../../reference/behavior-considered-undefined.html
 ///
 /// # Examples
@@ -343,7 +343,7 @@ pub unsafe fn zeroed<T>() -> T {
 /// This is useful for [FFI] functions and initializing arrays sometimes,
 /// but should generally be avoided.
 ///
-/// [FFI]: ../../book/ffi.html
+/// [FFI]: ../../book/first-edition/ffi.html
 ///
 /// # Undefined behavior
 ///
@@ -525,7 +525,7 @@ pub fn replace<T>(dest: &mut T, mut src: T) -> T {
 /// it will not release any borrows, as borrows are based on lexical scope.
 ///
 /// This effectively does nothing for
-/// [types which implement `Copy`](../../book/ownership.html#copy-types),
+/// [types which implement `Copy`](../../book/first-edition/ownership.html#copy-types),
 /// e.g. integers. Such values are copied and _then_ moved into the function,
 /// so the value persists after this function call.
 ///

src/libcore/raw.rs

@@ -25,7 +25,7 @@
 /// Book][moreinfo] contains more details about the precise nature of
 /// these internals.
 ///
-/// [moreinfo]: ../../book/trait-objects.html#representation
+/// [moreinfo]: ../../book/first-edition/trait-objects.html#representation
 ///
 /// `TraitObject` is guaranteed to match layouts, but it is not the
 /// type of trait objects (e.g. the fields are not directly accessible

src/libstd/lib.rs

@@ -174,7 +174,7 @@
 //! [slice]: primitive.slice.html
 //! [`atomic`]: sync/atomic/index.html
 //! [`collections`]: collections/index.html
-//! [`for`]: ../book/loops.html#for
+//! [`for`]: ../book/first-edition/loops.html#for
 //! [`format!`]: macro.format.html
 //! [`fs`]: fs/index.html
 //! [`io`]: io/index.html
@@ -189,14 +189,14 @@
 //! [`sync`]: sync/index.html
 //! [`thread`]: thread/index.html
 //! [`use std::env`]: env/index.html
-//! [`use`]: ../book/crates-and-modules.html#importing-modules-with-use
-//! [crate root]: ../book/crates-and-modules.html#basic-terminology-crates-and-modules
+//! [`use`]: ../book/first-edition/crates-and-modules.html#importing-modules-with-use
+//! [crate root]: ../book/first-edition/crates-and-modules.html#basic-terminology-crates-and-modules
 //! [crates.io]: https://crates.io
-//! [deref coercions]: ../book/deref-coercions.html
+//! [deref coercions]: ../book/first-edition/deref-coercions.html
 //! [files]: fs/struct.File.html
 //! [multithreading]: thread/index.html
 //! [other]: #what-is-in-the-standard-library-documentation
-//! [primitive types]: ../book/primitive-types.html
+//! [primitive types]: ../book/first-edition/primitive-types.html
 
 #![crate_name = "std"]
 #![stable(feature = "rust1", since = "1.0.0")]

src/libstd/primitive_docs.rs

@@ -29,7 +29,7 @@
 /// ```
 ///
 /// [`assert!`]: macro.assert.html
-/// [`if`]: ../book/if.html
+/// [`if`]: ../book/first-edition/if.html
 /// [`BitAnd`]: ops/trait.BitAnd.html
 /// [`BitOr`]: ops/trait.BitOr.html
 /// [`Not`]: ops/trait.Not.html
@@ -490,7 +490,7 @@ mod prim_str { }
 /// assert_eq!(tuple.2, 'c');
 /// ```
 ///
-/// For more about tuples, see [the book](../book/primitive-types.html#tuples).
+/// For more about tuples, see [the book](../book/first-edition/primitive-types.html#tuples).
 ///
 /// # Trait implementations
 ///