Ben Gamari authored Jan 18, 2016 and Ben Gamari committed Jan 19, 2016

This hides derived OccNames from the Names returned from
runDeclsWithLocation and clarifies the documentation. This is done to
ensure that these names (originating from, e.g., derived Generic
instances and type representation bindings) don't show up in ghci output
when run with `:set +t`. This fixes #11051.

Test Plan: Validate with included tests

Reviewers: austin

Reviewed By: austin

Subscribers: thomie, hvr

Differential Revision: https://phabricator.haskell.org/D1794

GHC Trac Issues: #11051