Improve doc for block level buttons

docs/base-css.html

@@ -1500,11 +1500,14 @@ For example, <code>section</code> should be wrapped as inline.
           <p>Create block level buttons&mdash;those that span the full width of a parent&mdash; by adding <code>.btn-block</code>.</p>
           <div class="bs-docs-example">
             <div class="well" style="max-width: 400px; margin: 0 auto 10px;">
-              <button type="button" class="btn btn-large btn-primary btn-block">Block level button</button>
+              <button type="button" class="btn btn-large btn-block btn-primary">Block level button</button>
               <button type="button" class="btn btn-large btn-block">Block level button</button>
             </div>
           </div>
-          <pre class="prettyprint linenums">&lt;button class="btn btn-large btn-block" type="button"&gt;Block level button&lt;/button&gt;</pre>
+<pre class="prettyprint linenums">
+&lt;button class="btn btn-large btn-block btn-primary" type="button"&gt;Block level button&lt;/button&gt;
+&lt;button class="btn btn-large btn-block" type="button"&gt;Block level button&lt;/button&gt;
+</pre>
 
 
           <h2>Disabled state</h2>

docs/templates/pages/base-css.mustache

@@ -1437,11 +1437,14 @@
           <p>{{_i}}Create block level buttons&mdash;those that span the full width of a parent&mdash; by adding <code>.btn-block</code>.{{/i}}</p>
           <div class="bs-docs-example">
             <div class="well" style="max-width: 400px; margin: 0 auto 10px;">
-              <button type="button" class="btn btn-large btn-primary btn-block">{{_i}}Block level button{{/i}}</button>
+              <button type="button" class="btn btn-large btn-block btn-primary">{{_i}}Block level button{{/i}}</button>
               <button type="button" class="btn btn-large btn-block">{{_i}}Block level button{{/i}}</button>
             </div>
           </div>
-          <pre class="prettyprint linenums">&lt;button class="btn btn-large btn-block" type="button"&gt;{{_i}}Block level button{{/i}}&lt;/button&gt;</pre>
+<pre class="prettyprint linenums">
+&lt;button class="btn btn-large btn-block btn-primary" type="button"&gt;{{_i}}Block level button{{/i}}&lt;/button&gt;
+&lt;button class="btn btn-large btn-block" type="button"&gt;{{_i}}Block level button{{/i}}&lt;/button&gt;
+</pre>
 
 
           <h2>{{_i}}Disabled state{{/i}}</h2>