users-guide: Mention changes necessary due to #13391
authorBen Gamari <bgamari.foss@gmail.com>
Tue, 19 Sep 2017 20:57:08 +0000 (16:57 -0400)
committerBen Gamari <ben@smart-cactus.org>
Tue, 19 Sep 2017 20:57:20 +0000 (16:57 -0400)
commitbbb8cb92b66d83bb7d472e7905c84c28cbb0997c
treebed46af690f174b9e79a76b76341074ccd0bf614
parent022455ffcf01e950ec020f9873874e68fbf7c666
users-guide: Mention changes necessary due to #13391

Some variant of this should also be added to the migration guide.

[skip ci]

Test Plan: Read it

Reviewers: goldfire, austin

Reviewed By: goldfire

Subscribers: rwbarton, thomie

GHC Trac Issues: #13391

Differential Revision: https://phabricator.haskell.org/D3966
docs/users_guide/8.4.1-notes.rst