Clean up trailing and leading whitespace

app/views/layouts/tutorial/misconfig/_misconfig_first.html.erb

@@ -52,7 +52,7 @@
           </div>
           <div class="accordion-body collapse" id="collapseThree" style="height: 0px;">
             <div class="accordion-inner">
-             The solution for this issue is quite simple. In your application.rb file set the configuration as follows. 
+             The solution for this issue is quite simple. In your application.rb file set the configuration as follows.
             <pre class="ruby">
             <%= %q{
               config.active_record.whitelist_attributes=true
@@ -73,7 +73,7 @@
           </div>
           <div class="accordion-body collapse" id="collapseFour" style="height: 0px;">
             <div class="accordion-inner">
-             It has to do with mass-assignment, whitelisting and configuration. 
+             It has to do with mass-assignment, whitelisting and configuration.
             </div>
           </div>
         </div>

app/views/layouts/tutorial/misconfig/_misconfig_second.html.erb

@@ -71,7 +71,7 @@
           </div>
           <div class="accordion-body collapse" id="collapseEight" style="height: 0px;">
             <div class="accordion-inner">
-             Think HTML entities, escaping and initializers. 
+             Think HTML entities, escaping and initializers.
             </div>
           </div>
         </div>