[GHC] #12617: Make the interface of traceTc and traceRn the same

[GHC]

#12617: Make the interface of traceTc and traceRn the same
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        Reporter:  mpickering        |                Owner:
            Type:  task              |               Status:  new
        Priority:  lowest            |            Milestone:
       Component:  Compiler          |              Version:  8.0.1
      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:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"925d178e023ec3c481ec8a5a38019797b779f7d7/ghc"
 925d178e/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="925d178e023ec3c481ec8a5a38019797b779f7d7"
 Make traceRn behave more like traceTc

 Reviewers: bgamari, austin

 Reviewed By: bgamari

 Subscribers: thomie

 Differential Revision: https://phabricator.haskell.org/D2586

 GHC Trac Issues: #12617
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12617#comment:5>
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