Spacing fixes

Author: James Mejia

_includes/sxs/02-extending/part-two.html

@@ -97,7 +97,7 @@ <h4 class="filename"><span class="material-icons" aria-hidden="true">description
 }</pre>
   </div>
   <p class="step-description">
-    Now we're making progress. This component is looking pretty good. 
+    Now we're making progress. This component is looking pretty good.
   </p>
   <p class="step-description">In our next section, we'll take a look at using everything USWDS has to offer to create a custom component!</p>
 </section>