Update normalize.css and demo.html from github/master

Author: necolas

demo.html

@@ -55,12 +55,12 @@ <h1>Text-level semantics</h1>
 
         <p>
         The <a href="#">a element</a> example<br>
-        The <abbr title="Title text">abbr element</abbr> example<br>
+        The <abbr>abbr element</abbr> and <abbr title="Title text">abbr element with title</abbr> examples<br>
         The <b>b element</b> example<br>
         The <cite>cite element</cite> example<br>
         The <code>code element</code> example<br>
         The <del>del element</del> example<br>
-        The <dfn>dfn element</dfn> example<br>
+        The <dfn>dfn element</dfn> and <dfn title="Title text">dfn element with title</dfn> examples<br>
         The <em>em element</em> example<br>
         The <i>i element</i> example<br>
         The img element <img src="http://placekitten.com/16/16" alt=""> example<br>

normalize.css

@@ -1,4 +1,4 @@
-/*! normalize.css 2011-08-11T09:26 UTC · http://github.com/necolas/normalize.css */
+/*! normalize.css 2011-08-12T17:28 UTC · http://github.com/necolas/normalize.css */
 
 /* =============================================================================
    HTML5 display definitions
@@ -373,12 +373,14 @@ input[type="submit"] {
 }
 
 /*
- * Addresses box sizing set to content-box in IE8/9
+ * 1. Addresses box sizing set to content-box in IE8/9
+ * 2. Addresses excess padding in IE8/9
  */
 
 input[type="checkbox"],
 input[type="radio"] {
-    box-sizing: border-box;
+    box-sizing: border-box; /* 1 */
+    padding: 0; /* 2 */
 }
 
 /*