Sat, 29 Mar 2003 12:28:53 +0100 berghofe Margin for pretty-printing is now a mutable reference.
Wed, 26 Mar 2003 12:25:56 +0100 paulson Proofs for section 4.5.3
Tue, 25 Mar 2003 10:03:11 +0100 berghofe Added show_brackets to settings menu.
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