patch applied (ghc): Improve error messages slightly, saying " a1...an" instead of " a b c"

[Simon Peyton Jones]

Wed Mar 14 09:29:06 PDT 2007  simonpj at microsoft.com
  * Improve error messages slightly, saying "a1...an" instead of "a b c"

    M ./compiler/typecheck/TcClassDcl.lhs -1 +1
    M ./compiler/typecheck/TcMType.lhs -2 +2
    M ./compiler/typecheck/TcTyClsDecls.lhs -1 +1