nushio authored Feb 20, 2016 and Ben Gamari committed Feb 20, 2016

Ticket #11535 dealt with derived Read instances of infix Unicode
value constructors. GHC 7.10.3 used to derive (Read/Show)
instances so that `read . show` for values of such types had no
parse.

The issue has been fixed by other compiler update. This patch
adds only tests, so that derived instance of Read/Show for infix
Unicode value constructors has correct parse, satisfying Haskell
2010 Specification.

Resolves: #11535

Test Plan: `make test TEST=T11535`

Reviewers: austin, rwbarton, thomie, bgamari

Reviewed By: rwbarton, thomie, bgamari

Subscribers: rwbarton, thomie

Projects: #ghc

Differential Revision: https://phabricator.haskell.org/D1884

GHC Trac Issues: #11535