[cvs-nhc98] Add tuple instances up to 7 for Ix, Eq, Ord, Bounded, Read

malcolm: Wed May 30 15:07:49 CEST 2001 Update of /usr/src/master/nhc/src/prelude/Ix In directory hinken:/tmp/cvs-serv6825/Ix Modified Files: Ix_4.hs Makefile Added Files: Ix_5.hs Ix_6.hs Ix_7.hs Log Message: Add tuple instances up to 7 for Ix, Eq, Ord, Bounded, Read, and Show, to conform to the revised wording of the Haskell'98 Report.