etc/isabelle.css

--- a/etc/isabelle.css	Wed May 31 11:43:37 2017 +0200
+++ b/etc/isabelle.css	Wed May 31 11:49:29 2017 +0200
@@ -114,7 +114,7 @@
   top: -0.5ex;
   left: 5em;
   visibility: hidden;
-  width: 40em;
+  width: 50em;
   border: 1px solid #808080;
   padding: 1px 1px;
   background-color: #FFFFE9;