anchor.diff:  
     <%= f.input :content_type, :collection => content_type_options,
                 :hint => "multiple select", :input_html => { :multiple => true } %>
  -  <pre class='prettyprint linenums lang-rb'> f.input :content_type, :collection =&gt; content_type_options, :input_html =&gt; { :multiple =&gt; true } </pre>
  +<pre class='prettyprint linenums lang-rb'>
  +  f.input :content_type, :collection =&gt; content_type_options, :input_html =&gt; { :multiple =&gt; true }
  +</pre>
   
     <%= f.input :category, :collection => content_type_options,
                 :hint => "simple select box" %>
  -  <pre class='prettyprint linenums lang-rb'> f.input :category, :collection =&gt; content_type_options, :hint =&gt; "simple select box" </pre>
  +<pre class='prettyprint linenums lang-rb'>
  +  f.input :category, :collection =&gt; content_type_options, :hint =&gt; "simple select box"
  +</pre>
   
     <%= f.input :content, :input_html => { :class => "span6" } %>
  -  <pre class='prettyprint linenums lang-rb'> f.input :content, :input_html =&gt; { :class =&gt; "span6" } </pre>
  +<pre class='prettyprint linenums lang-rb'>
  +  f.input :content, :input_html =&gt; { :class =&gt; "span6" }
  +</pre>
   
     <%= f.input :disabled_text, :disabled => true,
                 :hint => "an example of disabled input" %>
  -  <pre class='prettyprint linenums lang-rb'> f.input :disabled_text, :disabled =&gt; true, :hint =&gt; "an example of disabled input" </pre>
  +
  +<pre class='prettyprint linenums lang-rb'>
  +  f.input :disabled_text, :disabled =&gt; true, :hint =&gt; "an example of disabled input"
  +</pre>
   
     <%= f.input :disabled_text, :wrapper => :prepend do %>
       <%= content_tag :label, :class => "add-on" do %>
  
positive.code:     <%= f.button :submit, :class => 'primary' %>
      <%= button_tag 'Cancel', :type => :reset, :class => "btn" %>
    </div>
      <pre class='prettyprint linenums lang-rb'>
   f.button :submit, :class =&gt; 'primary'
   button_tag 'Cancel', :type =&gt; :reset, :class =&gt; "btn" </pre>
  <% end %>
  
negative.code: </div>
  
  <%= simple_form_for @article, :wrapper => :bootstrap, :html => { :class => 'form-horizontal' } do |f| %>
  <pre class='prettyprint linenums lang-rb'>
  simple_form_for(@article, :wrapper =&gt; :bootstrap, :html =&gt; { :class =&gt; 'form-horizontal' }) do |f|
  </pre>
  
    <% if f.error_notification %>
      <div class="alert alert-error fade in">
  