Improve typography

src/cargo.md

@@ -9,4 +9,4 @@ useful features to improve code quality and developer velocity! These include
 - Awareness of benchmarks
 
 This chapter will go through some quick basics, but you can find the
-comprehensive docs [here](http://doc.crates.io/index.html).
+comprehensive docs in [The Cargo Book](https://doc.rust-lang.org/cargo/).

src/cargo/conventions.md

@@ -29,8 +29,9 @@ To tell `cargo` to compile or run this binary as opposed to the default or other
 binaries, we just pass `cargo` the `--bin my_other_bin` flag, where `my_other_bin`
 is the name of the binary we want to work with.
 
-In addition to extra binaries, there is support for benchmarks, tests, and
-examples. The full capabilities are documented
-[here](http://doc.crates.io/book/guide/project-layout.html).
+In addition to extra binaries, `cargo` supports [more features] such as
+benchmarks, tests, and examples.
 
 In the next chapter, we will look more closely at tests.
+
+[more features]: https://doc.rust-lang.org/cargo/guide/project-layout.html

src/cargo/deps.md

@@ -40,9 +40,6 @@ authors = ["mark"]
 [dependencies]
 ```
 
-You can read more extensively about all of the available configuration options
-[here](http://doc.crates.io/manifest.html).
-
 The `name` field under `package` determines the name of the project. This is
 used by `crates.io` if you publish the crate (more later). It is also the name
 of the output binary when you compile.
@@ -63,9 +60,8 @@ add a dependency to our program, we can simply add the following to our
 crate clap` in `main.rs`, just like normal. And that's it! You can start using
 `clap` in your program.
 
-`cargo` also supports other types of dependencies. Here is just a small
-sampling. You can find out more
-[here](http://doc.crates.io/specifying-dependencies.html).
+`cargo` also supports [other types of dependencies][dependencies]. Here is just
+a small sampling:
 
 ```toml
 [package]
@@ -79,10 +75,18 @@ rand = { git = "https://github.com/rust-lang-nursery/rand" } # from online repo
 bar = { path = "../bar" } # from a path in the local filesystem
 ```
 
+`cargo` is more than a dependency manager. All of the available
+configuration options are listed in the [format specification][manifest] of
+`Cargo.toml`.
+
 To build our project we can execute `cargo build` anywhere in the project
 directory (including subdirectories!). We can also do `cargo run` to build and
 run. Notice that these commands will resolve all dependencies, download crates
 if needed, and build everything, including your crate. (Note that it only
 rebuilds what it has not already built, similar to `make`).
 
 Voila! That's all there is to it!
+
+
+[manifest]: https://doc.rust-lang.org/cargo/reference/manifest.html
+[dependencies]: https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html

src/trait/iter.md

@@ -1,6 +1,6 @@
 # Iterators
 
-The `Iterator` trait is used to implement iterators over collections such as arrays.
+The [`Iterator`][iter] trait is used to implement iterators over collections such as arrays.
 
 The trait requires only a method to be defined for the `next` element, 
 which may be manually defined in an `impl` block or automatically 
@@ -9,9 +9,6 @@ defined (as in arrays and ranges).
 As a point of convenience for common situations, the `for` construct 
 turns some collections into iterators using the [`.into_iterator()`][intoiter] method.
 
-Methods that can be accessed using the `Iterator` trait in addition 
-to those shown in the example below can be found [here][iter].
-
 ```rust,editable
 struct Fibonacci {
     curr: u32,

src/trait/ops.md

@@ -6,7 +6,7 @@ because operators are syntactic sugar for method calls. For example, the `+` ope
 `a + b` calls the `add` method (as in `a.add(b)`). This `add` method is part of the `Add`
 trait. Hence, the `+` operator can be used by any implementor of the `Add` trait.
 
-A list of the traits, such as `Add`, that overload operators is available [here][ops].
+A list of the traits, such as `Add`, that overload operators can be found in [`core::ops`][ops].
 
 ```rust,editable
 use std::ops;