Sun, 06 Mar 2016 18:15:09 +0100 wenzelm avoid redundant escapes;
Sun, 06 Mar 2016 16:19:02 +0100 wenzelm clarified treatment of fragments of Isabelle symbols during bootstrap;
Sun, 06 Mar 2016 13:19:19 +0100 wenzelm clarified ML syntax for strings concerning UTF8;
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