`/examples/foo.rs` is different from the tutorial

[vanillajonathan]

I read the tutorial then wanted to see what the finished code look like but when I looked in examples/foo.rs I saw that the code was different from the tutorial.

[zesterer]

The tutorial has not yet been rewritten for 1.0 (that's on my todo list, see #543). However, the foo.rs example has been updated (since it's checked by CI). If you're still using 0.9, you can see the old version here. However, I'd very much recommend using 1.0 since it improves upon 0.9 in innumerable ways, as well as being much faster.