- changed definition of simple let expressions - revised definition of case expressions - added stronger typing rule exIf0 for if expressions - small edits
- changed definition of simple let expressions
- revised definition of case expressions
- added stronger typing rule exIf0 for if expressions
- small edits


git-svn-id: 9ecf60ce9baff443e30a0472d3fd222fcb8117cf@3491 7b97033b-253e-4a5c-9b07-e25f9089a9fd

KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware,KestrelInstitute/Specware