Wed, 08 Sep 2010 18:00:37 +0200 wenzelm merged
Wed, 08 Sep 2010 16:50:24 +0200 bulwahn restricting invocation only if PROLOG_HOME is set
Wed, 08 Sep 2010 18:00:06 +0200 wenzelm tuned proofs (based on fancy gutter icons in Isabelle/jEdit);
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