Highlight mix test output on the homepage (elixir-lang#1494)

Author: wojtekmach

index.html

@@ -151,15 +151,15 @@ <h4>A growing ecosystem</h4>
 <divclass="entry-summary">
 <p>Elixir ships with a great set of tools to ease development. <ahref="https://hexdocs.pm/mix/">Mix is a build tool</a> that allows you to easily create projects, manage tasks, run tests and more:</p>
 
-{% highlight text %}
+<pre><code>
 $ mix new my_app
 $ cd my_app
 $ mix test
-.
+<spanstyle="color:#919D41">.</span>
 
 Finished in 0.04 seconds (0.04s on load, 0.00s on tests)
-1 tests, 0 failures
-{% endhighlight %}
+<spanstyle="color:#919D41">1 test, 0 failures</span>
+</code></pre>
 
 <p>Mix is also able to manage dependencies and integrates with the <ahref="https://hex.pm/">Hex package manager</a>, which performs dependency resolution, fetches remote packages, and <ahref="https://hexdocs.pm/">hosts documentation</a> for the whole ecosystem.</p>
 </div>