Kill trailing whitespace in erb files

app/views/posts/partials/show/_edit.html.erb

@@ -13,7 +13,7 @@
       This post is rating locked.
     <% else %>
       <%= f.label :blank, "Rating" %>
-  
+
       <fieldset class="ratings">
         <%= f.radio_button :rating, :e %>
         <%= f.label :rating_e, "Explicit" %>
@@ -23,21 +23,21 @@
 
         <%= f.radio_button :rating, :s %>
         <%= f.label :rating_s, "Safe" %>
-      </fieldset>      
+      </fieldset>
     <% end %>
   </div>
 
   <% if CurrentUser.is_builder? %>
     <div class="input">
       <%= f.label :blank, "Lock" %>
-    
+
       <fieldset class="locks">
         <%= f.check_box :is_note_locked %>
         <%= f.label :is_note_locked, "Notes" %>
 
         <%= f.check_box :is_rating_locked %>
         <%= f.label :is_rating_locked, "Rating" %>
-      
+
         <% if CurrentUser.is_admin? %>
           <%= f.check_box :is_status_locked %>
           <%= f.label :is_status_locked, "Status" %>
@@ -63,7 +63,7 @@
       <%= f.label :tag_string, "Tags" %>
       <%= f.text_area :tag_string , :size => "50x3" %>
     </div>
-  
+
     <%= button_tag "Related tags", :id => "related-tags-button", :type => "button" %>
     <%= button_tag "Artists", :id => "related-artists-button", :type => "button" %>
     <%= button_tag "Characters", :id => "related-characters-button", :type => "button" %>
@@ -71,7 +71,7 @@
   </div>
 
   <div class="input">
-    <%= submit_tag "Submit" %>      
+    <%= submit_tag "Submit" %>
   </div>
 
   <div id="artist-tags-container">
@@ -79,7 +79,7 @@
     <div id="artist-tags">
     </div>
   </div>
-  
+
   <div id="related-tags-container">
     <h1>Related Tags</h1>
     <div id="related-tags">