Rik Steenkamp authored Apr 02, 2016 and Matthew Pickering committed Apr 02, 2016

Add the function `pprPatSynType :: PatSyn -> SDoc` for printing pattern
synonym types, and remove the ambiguous `patSynType` function. Also,
the types in a `PatSyn` are now tidy.

Haddock submodule updated to reflect the removal of `patSynType` by
mpickering.

Fixes: #11213.

Reviewers: goldfire, simonpj, austin, mpickering, bgamari

Reviewed By: simonpj, mpickering

Subscribers: bollmann, simonpj, thomie

Differential Revision: https://phabricator.haskell.org/D1896

GHC Trac Issues: #11213