Pass sample code in through rustfmt

Some of the sample code in the "Get Started" tutorial aligned stuff
around equal signs. rustfmt would prefer it be formatted without the
alignment.

Author: spenczar

templates/learn/get-started.hbs

@@ -90,9 +90,9 @@ ferris-says = "0.1"</code></pre>
 use std::io::{stdout, BufWriter};
 
 fn main() {
-    let stdout  = stdout();
+    let stdout = stdout();
     let message = String::from("Hello fellow Rustaceans!");
-    let width   = message.chars().count();
+    let width = message.chars().count();
 
     let mut writer = BufWriter::new(stdout.lock());
     say(message.as_bytes(), width, &mut writer).unwrap();