Extend FormatSpec with a data types

[EncodePanda]

Show how different formatters are formatting code with a data type definition

[lukel97]

Thanks! From what I can see these changes look good but the test is failing on ghc 8.4.x

Expected "module    Format where\nfoo   :: Int ->  Int\nfoo  3 = 2\nfoo    x  = x\nbar   :: String ->   IO String\nbar s =  do\n      x <- return \"hello\"\n      return \"asdf\"\n      \ndata Baz = Baz { a :: Int, b :: String }\n\n" but got "module    Format where\nfoo   :: Int ->  Int\nfoo  3 = 2\nfoo    x  = x\nbar   :: String ->   IO String\nbar s =  do\n      x <- return \"hello\"\n      return \"asdf\"\n\ndata Baz = Baz { a :: Int, b :: String }\n\n"

Looks like a tab is being added in a specific version? Can you check that 8.4.x is using the same version of Ormolu as 8.6.x?

[fendor]

I think this would be enough to make the tests compile.

[alanz]

Are the spaces in the input data files originally deliberate?

[fendor]

@alanz I dont think so. However, I would like to merge this PR now, if everyone's fine with that.

[alanz]

I am happy to merge.