diff -r 8c0761260d22 Doc/tools/static/copybutton.js
--- a/Doc/tools/static/copybutton.js	Sat Feb 27 08:42:14 2016 +0200
+++ b/Doc/tools/static/copybutton.js	Sat Feb 27 15:19:35 2016 +0800
@@ -28,6 +28,7 @@
             var button = $('<span class="copybutton">&gt;&gt;&gt;</span>');
             button.css(button_styles)
             button.attr('title', hide_text);
+            button.data('hidden', 'false');
             jthis.prepend(button);
         }
         // tracebacks (.gt) contain bare text elements that need to be