Sun, 03 Mar 2013 13:43:57 +0100 wenzelm clarified Toplevel.element_result wrt. Toplevel.is_ignored;
Sun, 03 Mar 2013 13:23:06 +0100 wenzelm more Thy_Syntax.element operations;
Fri, 01 Mar 2013 22:15:31 +0100 traytel coercion-invariant arguments at work
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