about template haskell's pretty print: 3 % 5 -> 3 / 5

[Yoshikuni Jujo]

Hello!

I think it's better that the ghc can read what is printed by pretty
printer.

Now:

pprLit 0 (RationalL 3.5) => 7 % 2

I want:

pprLit 0 (RationalL 3.5) => 7 / 2

I'll send patch

---

pprLit i (RationalL rat) = parensIf (i > noPrec) $
	integer (numerator rat) <+> char '/' <+> integer (denominator rat)
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