Fri, 08 Jul 2011 11:50:58 +0200 wenzelm clarified Thy_Load.digest_file -- read ML files only once;
Fri, 08 Jul 2011 11:13:21 +0200 wenzelm tuned signature;
Thu, 07 Jul 2011 23:55:15 +0200 wenzelm simplified make_option/dest_option;
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