title: Using simple_form how do I get this class on these inner labels vs the outer label ones?
body: <p>So this is the outcome I am trying to get:</p>
  
  <pre><code>&lt;div class="control-group"&gt;
    &lt;label class="control-label" for="ListingType"&gt;Listing Type:&lt;/label&gt;
    &lt;div class="controls"&gt;
      &lt;label class="inline"&gt;&lt;input type="radio" name="ListingType"&gt; For Sale&lt;/label&gt;
      &lt;label class="inline"&gt;&lt;input type="radio" name="ListingType"&gt; For Rent&lt;/label&gt;
    &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>I tried this:</p>
  
  <pre><code>&lt;%= f.association :listing_type, label: "Listing Type: ", as: :radio_buttons, input_html: { class: 'inline'} %&gt;       
  </code></pre>
  
  <p>This is what was produced:</p>
  
  <pre><code>&lt;div class="control-group radio_buttons optional"&gt;
     &lt;label class="radio_buttons optional control-label"&gt;Listing Type:&lt;/label&gt;
     &lt;div class="controls"&gt;
        &lt;label class="radio"&gt;&lt;input class="radio_buttons optional inline" id="listing_listing_type_id_1" name="listing[listing_type_id]" type="radio" value="1" /&gt;For Sale&lt;/label&gt;
        &lt;label class="radio"&gt;&lt;input class="radio_buttons optional inline" id="listing_listing_type_id_2" name="listing[listing_type_id]" type="radio" value="2" /&gt;For Rent&lt;/label&gt;
    &lt;/div&gt;
  &lt;/div&gt;  
  </code></pre>
  
  <p>Notice the <code>label.class="radio"</code> as opposed to <code>label.class="inline"</code>.</p>
  
  <p>That's the major thing I am trying to get done properly. </p>
  
  <p>I tried <code>label_html: { class: 'inline' }</code> and it produces this:     </p>
  
  <pre><code>&lt;div class="control-group radio_buttons optional"&gt;
     &lt;label class="radio_buttons optional control-label inline"&gt;Listing Type:&lt;/label&gt;
     &lt;div class="controls"&gt;
       &lt;label class="radio"&gt;&lt;input class="radio_buttons optional" id="listing_listing_type_id_1" name="listing[listing_type_id]" type="radio" value="1" /&gt;For Sale&lt;/label&gt;
       &lt;label class="radio"&gt;&lt;input class="radio_buttons optional" id="listing_listing_type_id_2" name="listing[listing_type_id]" type="radio" value="2" /&gt;For Rent&lt;/label&gt;
     &lt;/div&gt;
  &lt;/div&gt;  
  </code></pre>
  
  <p>i.e. it moves the class <code>inline</code> to the outermost <code>&lt;label&gt;</code> as opposed to the <code>label</code> for each radio button.</p>
  
  <p>Thoughts?</p>