// ===================
//
// This is [Rust-101](https://www.ralfj.de/projects/rust-101/), a small tutorial for
-// the [Rust language](http://www.rust-lang.org/). It is intended to be an interactive,
+// the [Rust language](https://www.rust-lang.org/). It is intended to be an interactive,
// hands-on course: I believe the only way to *really* learn a language is to write code
// in it, so you should be coding during the course.
//
// ---------------
//
// You will need to have Rust installed, of course. It is available for download on
-// [the Rust website](http://www.rust-lang.org/). Make sure you get at least version 1.2
-// (at the time of writing, that's the current beta release). More detailed installation
-// instructions are provided in [the second chapter of The Book](https://doc.rust-lang.org/stable/book/installing-rust.html).
+// [the Rust website](https://www.rust-lang.org/). Make sure you get at least version 1.2.
+// More detailed installation instructions are provided in
+// [the second chapter of The Book](https://doc.rust-lang.org/stable/book/installing-rust.html).
// This will also install `cargo`, the tool responsible for building rust projects (or *crates*).
//
-// Next, fetch the Rust-101 source code from the [git repository](http://www.ralfj.de/git/rust-101.git)
+// Next, fetch the Rust-101 source code from the [git repository](https://www.ralfj.de/git/rust-101.git)
// (also available [on GitHub](https://github.com/RalfJung/rust-101), and as a
// [zip archive](https://github.com/RalfJung/rust-101/archive/master.zip) in case you don't have git installed).
//
// * [Rust by Example](http://rustbyexample.com/)
// * The [Rust Subreddit](https://www.reddit.com/r/rust/)
// * A [collection of links](https://github.com/ctjhoa/rust-learning) to blog posts, articles, videos, etc. for learning Rust.
-// * For the IRC channel and other forums, see the "Community" section of the [Rust Documentation index](http://doc.rust-lang.org/index.html)
+// * For the IRC channel and other forums, see the "Community" section of the [Rust Documentation index](https://doc.rust-lang.org/index.html)