Correct "copy" src block function

scss/partials/_base.scss

@@ -325,3 +325,14 @@ span[id*='MathJax-Span']{
         clear: both;
     }
 }
+
+// TODO Highlight links/etc.
+@-webkit-keyframes target {
+    from { background:#ffffff; }
+    50% { background:#ffffd3; }
+    to { background:#ffffff; }
+}
+
+:target {
+    -webkit-animation: target .5s linear;
+}