Fri, 17 Jul 2009 23:11:40 +0200 wenzelm tuned/modernized Envir.subst_XXX;
Fri, 17 Jul 2009 22:54:11 +0200 wenzelm tuned/modernized subst: Same.operation;
Fri, 17 Jul 2009 22:51:18 +0200 wenzelm tuned;
Fri, 17 Jul 2009 21:33:00 +0200 wenzelm tuned/modernized Envir operations;
Fri, 17 Jul 2009 21:33:00 +0200 wenzelm major cleanup, simplification, modernization;
Fri, 17 Jul 2009 21:32:59 +0200 wenzelm eq_type: special case for empty environment;
Fri, 17 Jul 2009 21:32:58 +0200 wenzelm compare types directly -- no need to invoke Type.eq_type with empty environment;
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