diff lib/ur/option.ur @ 1380:ede95ecb4000

Thanks to Vag Vagoff, catch some cases of an obsolete notation for guarded types in the manual
author Adam Chlipala <adam@chlipala.net>
date Thu, 06 Jan 2011 08:55:53 -0500
parents 757dbac0454d
children a99b743a3087
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