Fix a few typos in tutorial 1
<Ctrl-C> gets interpreted as an HTML tag as is so we need to put it in backtics
@@ -89,7 +89,7 @@ fn main() {
It's rather easy to identify the two steps involved.
If you run this, you'll get an empty blue terminal, with no way of properly
-leaving the application (you'll have to press <Ctrl-C> to kill it).
+leaving the application (you'll have to press `<Ctrl-C>` to kill it).
[`Cursive`]: https://docs.rs/cursive/0/cursive/struct.Cursive.html
