clarify unstyled lists docs

docs/base-css.html

@@ -350,7 +350,7 @@
 </pre>
 
         <h3>Unstyled</h3>
-        <p>A list of items with no <code>list-style</code> or additional left padding.</p>
+        <p>Remove default the <code>list-style</code> and left padding on list items (immediate children only).</p>
         <div class="bs-docs-example">
           <ul class="unstyled">
             <li>Lorem ipsum dolor sit amet</li>

docs/templates/pages/base-css.mustache

@@ -287,7 +287,7 @@
 </pre>
 
         <h3>{{_i}}Unstyled{{/i}}</h3>
-        <p>{{_i}}A list of items with no <code>list-style</code> or additional left padding.{{/i}}</p>
+        <p>{{_i}}Remove default the <code>list-style</code> and left padding on list items (immediate children only).{{/i}}</p>
         <div class="bs-docs-example">
           <ul class="unstyled">
             <li>Lorem ipsum dolor sit amet</li>