### Improve Haddock documentation for compact.

Test Plan: none Reviewers: simonmar, bgamari, austin Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D3148

Showing

Test Plan: none Reviewers: simonmar, bgamari, austin Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D3148

Showing
with
**110 additions**
and
**35 deletions**
**+110**
**-35**