[cvs-nhc98] Literal newlines and tabs are not permitted in literal str

malcolm: Thu Nov 1 11:44:17 CET 2001 Update of /usr/src/master/nhc/src/compiler98 In directory hinken:/tmp/cvs-serv25812 Modified Files: LexStr.hs Log Message: Literal newlines and tabs are not permitted in literal strings. Outlaw them in the lexer, and add error messages indicating the alternative (\n and \t).