Simon Peyton Jones authored Feb 28, 2017 and David Feuer committed Feb 28, 2017

This is just a refactoring, moving these two functions where
they belong.

The reason they were there was because of the use of isJoinId_maybe
in the OutputableBndr instance of TaggedBndr, which was in CoreSyn.
I moved it to PprCore, to join the OutputableBndr instance for
Var.  That makes more sense anyway.

Reviewers: austin, bgamari

Reviewed By: bgamari

Subscribers: thomie

Differential Revision: https://phabricator.haskell.org/D3207