Fix a broken invariant
authorSimon Marlow <simonmar@microsoft.com>
Thu, 16 Mar 2006 13:41:51 +0000 (13:41 +0000)
committerSimon Marlow <simonmar@microsoft.com>
Thu, 16 Mar 2006 13:41:51 +0000 (13:41 +0000)
commit5b9df10c2fe43ff3ea8d64cc37eeb9c2aca70d82
treec5ca532f2e23a4ea8e3f842f2ed002e653cddae5
parentb884ab3395ebc2e61f6025cab954f65f17aaf4c4
Fix a broken invariant
Patch from #694,  for the problem "empty is an identity for <> and $$" is
currently broken by eg. isEmpty (empty<>empty)"
libraries/base/Text/PrettyPrint/HughesPJ.hs