allow non-balanced brackets, parens, etc

[cdepillabout]

Pretty-simple doesn't currently allow non-balanced brackets, parens, etc.

This should be considered a bug. This is also related to #5.

[dminuoso]

Since pretty-simple is by design for data types with a Show instance I do not consider it a bug.

The Haskell Report has the following to say about Show:

The result of show is a syntactically correct Haskell expression containing only constants, given the fixity
declarations in force at the point where the type is declared.

We can reasonably expect the input to be balanced.

[cdepillabout]

@dminuoso pretty-simple is designed for data types with a Show instance, but it is also designed to be more flexible than other pretty-printing libraries. It should try it's hardest to pretty-print anything, even if it is not syntactically correct.

There are many commonly used data types with non-syntactically-correct Show instances, and pretty-simple should ideally handle them. pretty-simple should also ideally not choke on non-balanced brackets, parens, etc.

[cdepillabout]

Here is an example of this failing to pretty-print something with non-balanced parenthesis:

$ ghci
> import Text.Pretty.Simple
> import Data.Text.Lazy
> putStrLn $ unpack $  pString "Just \"hello\" ) 3345"
Just "hello"

You can see that everything after the ) character doesn't get printed. This should be fixed.

[cdepillabout]

52 is another instance of things being dropped after non-balanced parenthesis. This should really be fixed.