Hello,

For:

    parseOptional = Parse.parseOptional

I got warning messages:

Swish/HaskellUtils/ParseURI.hs:77:4:
    Warning: Defined but not used: `parseOptional'

Swish/HaskellUtils/ParseURI.hs:77:4:
    Warning: Definition but no type signature for `parseOptional'
             Inferred type: parseOptional :: forall a b.
                                             Parse.Parser a [b] -> [a] -> [([b], [a])]

IMO the warning messages should be reversed! (parseOptional was never "used" .. called ... but I would strongly prefer the type signature warning first.

Kind regards, Vasili