Wed, 15 Feb 2012 21:38:28 +0100 wenzelm uniform Isar source formatting for this file;
Wed, 15 Feb 2012 21:29:23 +0100 wenzelm clarified outer syntax "constdecl", which is only local to some rail diagrams;
Wed, 15 Feb 2012 21:08:27 +0100 wenzelm discontinued obsolete "prems" fact;
Wed, 15 Feb 2012 20:56:30 +0100 wenzelm eliminated slightly odd / obsolete DETERM_UNTIL, DETERM_UNTIL_SOLVED (cf. 941afb897532, ea0668a1c0ba);
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