Add back missing .diff style.
--- a/spec/latest/json-ld-api/index.html	Sun Jun 24 18:18:22 2012 -0700
+++ b/spec/latest/json-ld-api/index.html	Sun Jun 24 18:19:40 2012 -0700
@@ -242,6 +242,9 @@
       }
 //]]>
   </script>
+<style type="text/css">
+.diff { font-weight:bold; color:#0a3; }
+</style>
 </head>
 
 <body>
--- a/spec/latest/json-ld-framing/index.html	Sun Jun 24 18:18:22 2012 -0700
+++ b/spec/latest/json-ld-framing/index.html	Sun Jun 24 18:19:40 2012 -0700
@@ -241,6 +241,9 @@
       }
 //]]>
   </script>
+<style type="text/css">
+.diff { font-weight:bold; color:#0a3; }
+</style>
 </head>
 
 <body>
--- a/spec/latest/json-ld-syntax/index.html	Sun Jun 24 18:18:22 2012 -0700
+++ b/spec/latest/json-ld-syntax/index.html	Sun Jun 24 18:19:40 2012 -0700
@@ -239,6 +239,9 @@
       }
 //]]>
   </script>
+<style type="text/css">
+.diff { font-weight:bold; color:#0a3; }
+</style>
 </head>
 
 <body>
--- a/spec/latest/rdf-graph-normalization/index.html	Sun Jun 24 18:18:22 2012 -0700
+++ b/spec/latest/rdf-graph-normalization/index.html	Sun Jun 24 18:19:40 2012 -0700
@@ -241,6 +241,9 @@
         return content;
       }
   </script>
+<style type="text/css">
+.diff { font-weight:bold; color:#0a3; }
+</style>
 </head>
 
 <body>