src/Pure/Isar/line_structure.scala
Tue, 31 Jul 2018 21:21:20 +0200 wenzelm tuned signature;
Fri, 23 Jun 2017 14:59:00 +0200 wenzelm more information;
Thu, 04 Aug 2016 10:55:51 +0200 wenzelm clarified modules;
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