[cvs-nhc98] Change internal IOError representation completely.

malcolm: Thu Mar 29 23:01:59 CEST 2001 Update of /usr/src/master/nhc/src/prelude/IO In directory hinken:/tmp/cvs-serv18806/prelude/IO Modified Files: HFileSize.hs HFlush.hs HGetChar.hs HGetFileName.hs HGetPosn.hs HPutChar.hs HSeek.hs HSetBuffering.hs HSetPosn.hs IoeGetErrorString.hs IoeGetFileName.hs IoeGetHandle.hs IsEOFError.hs IsIOErrors.hs IsUserError.hs OpenFile.hs Log Message: Change internal IOError representation completely. (Remove obsolete constructors, add more information fields to the remaining ones, and improve the printing routines.) This necessitates corresponding changes in many IO functions.