Sat, 27 Nov 2010 20:10:57 +0100 wenzelm more thorough process termination (cf. Scala version);
Sat, 27 Nov 2010 19:17:55 +0100 wenzelm prefer Isabelle/ML concurrency elements;
Sat, 27 Nov 2010 16:29:53 +0100 wenzelm removed bash from ML system bootstrap, and past the Secure ML barrier;
Sat, 27 Nov 2010 16:27:52 +0100 wenzelm more proper int wrappers;
Sat, 27 Nov 2010 15:58:36 +0100 wenzelm explicit check for requirement;
Sat, 27 Nov 2010 15:45:20 +0100 wenzelm more basic Isabelle_System.mkdir;
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