doctest fails

[alaendle]

colonnade got reenabled on stackage nightly, however the tests need to be disabled due to...

src/Colonnade.hs:97: failure in expression `:t colHouse'
expected: colHouse :: Colonnade Headed House [Char]
 but got: colHouse :: Colonnade Headed House String

[andrewthad]

I've fixed this in ff69b64, and there are more details in the commit message. The not-yet-released version of colonnade has already removed doctests the test suite anyway (you now have to invoke doctest manually), so I'll mark this as closed whenever I cut a new release.