Fixed a bug in lexFracExp that made lex choke on "123." (previously the code differed slightly from the lexer in the Haskell Report).
Fixed a bug in lexFracExp that made lex choke on "123." (previously the code
differed slightly from the lexer in the Haskell Report).

FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs