[GHC] #15269: Qualified Names in --show-iface output

[GHC]

#15269: Qualified Names in --show-iface output
-------------------------------------+-------------------------------------
        Reporter:  sjakobi           |                Owner:  (none)
            Type:  feature request   |               Status:  new
        Priority:  normal            |            Milestone:  8.8.1
       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 sjakobi):

 > In ​Phab:D4806, I proposed to hardcode qualification for --show-iface.
 But this may create unwanted noise in different usecases.

 I'm wondering if it might be more acceptable if I limit the hardcoded
 qualification to the the area of interest to me? I just found out about
 `withPprStyle`.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15269#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler