Mon, 28 Jan 2019 20:32:09 +0100 revert accident with raw Unicode (not Isabelle symbols) in 7404f5b91e56;
wenzelm [Mon, 28 Jan 2019 20:32:09 +0100] rev 69747
revert accident with raw Unicode (not Isabelle symbols) in 7404f5b91e56;
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