Kill trailing whitespace in erb files

app/views/artists/banned.html.erb

@@ -1,9 +1,9 @@
 <div id="c-artists">
   <div id="a-banned">
     <h1>Banned Artists</h1>
-    
+
     <p>The following artists have requested they be removed from the site. Please do not upload any works from these artists. These artists all have implications pointing to the <code>banned_artist</code> tag.</p>
-    
+
     <ul>
       <% @artists.each do |artist| %>
         <li><%= link_to artist.name, artist_path(artist) %></li>