make nested cols code match given example

Author: mdo

docs/scaffolding.html

@@ -233,11 +233,11 @@ <h3>Example</h3>
     <div class="span6">
 <pre class="prettyprint linenums">
 &lt;div class="row"&gt;
-  &lt;div class="span12"&gt;
-    Level 1 of column
+  &lt;div class="span6"&gt;
+    Level 1 column
     &lt;div class="row"&gt;
-      &lt;div class="span6"&gt;Level 2&lt;/div&gt;
-      &lt;div class="span6"&gt;Level 2&lt;/div&gt;
+      &lt;div class="span3"&gt;Level 2&lt;/div&gt;
+      &lt;div class="span3"&gt;Level 2&lt;/div&gt;
     &lt;/div&gt;
   &lt;/div&gt;
 &lt;/div&gt;

docs/templates/pages/scaffolding.mustache

@@ -156,11 +156,11 @@
     <div class="span6">
 <pre class="prettyprint linenums">
 &lt;div class="row"&gt;
-  &lt;div class="span12"&gt;
-    {{_i}}Level 1 of column{{/i}}
+  &lt;div class="span6"&gt;
+    {{_i}}Level 1 column{{/i}}
     &lt;div class="row"&gt;
-      &lt;div class="span6"&gt;{{_i}}Level 2{{/i}}&lt;/div&gt;
-      &lt;div class="span6"&gt;{{_i}}Level 2{{/i}}&lt;/div&gt;
+      &lt;div class="span3"&gt;{{_i}}Level 2{{/i}}&lt;/div&gt;
+      &lt;div class="span3"&gt;{{_i}}Level 2{{/i}}&lt;/div&gt;
     &lt;/div&gt;
   &lt;/div&gt;
 &lt;/div&gt;