Collapsible set: Added info and demo of corner styling to the docs.

Author: jaspermdegroot

docs/content/content-collapsible-set.html

@@ -202,6 +202,32 @@ <h3>Section header, swatch E</h3>
 				<p>Collapsible content, swatch "d"</p>
 			</div>
 		</div>
+
+		<h2>Corner styling</h2>
+		<p>Add the <code>data-corners="false"</code> attribute to have an inset collapsible set without rounded corners.</p>
+
+
+<pre><code>		
+&lt;div data-role=&quot;collapsible-set&quot; <strong>data-corners=&quot;false&quot;</strong> data-theme=&quot;b&quot; data-content-theme=&quot;d&quot;&gt;
+</code></pre>	
+
+
+		<div data-role="collapsible-set" data-corners="false" data-theme="b" data-content-theme="d">
+			<div data-role="collapsible">
+				<h3>Section 1</h3>
+				<p>Collapsible content</p>
+			</div>
+			<div data-role="collapsible">
+				<h3>Section 2</h3>
+				<p>Collapsible content</p>
+
+			</div>
+			<div data-role="collapsible">
+				<h3>Section 3</h3>
+				<p>Collapsible content</p>
+			</div>
+		</div>
+
 
 	</div><!--/content-primary -->