Sun, 12 Nov 2006 21:14:52 +0100 wenzelm instantiate: tuned indentity case;
Sun, 12 Nov 2006 21:14:51 +0100 wenzelm removed dead code;
Sun, 12 Nov 2006 21:14:49 +0100 wenzelm mk_atomize: careful matching against rules admits overloading;
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