[GHC] #15326: Add option to disable error message expression context (the 'In the expression' things)

[GHC]

#15326: Add option to disable error message expression context (the 'In the
expression' things)
-------------------------------------+-------------------------------------
        Reporter:  dramforever       |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.4.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by simonpj):

 I'd be ok with someone adding such a flag.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15326#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler