Sat, 30 Nov 2019 16:42:15 +0100 wenzelm tuned -- avoid confusion of fun_t with fun_lhs;
Sat, 30 Nov 2019 15:56:09 +0100 wenzelm avoid shadowing of local bindings -- more maintainable;
Sat, 30 Nov 2019 15:17:23 +0100 wenzelm export spec rules;
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