[cvs-nhc98] patch applied (hat): Literal newlines and tabs are not permitted in literal strings.

[Malcolm Wallace]

Thu Nov  1 02:44:17 PST 2001  malcolm
  * 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).

    M ./src/compiler98/LexStr.hs -70 +89