[GHC] #10478: Shorter import syntax

[GHC]

#10478: Shorter import syntax
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        Reporter:  acowley           |                   Owner:
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Compiler          |                 Version:  7.10.1
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:  Phab:D1238
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Comment (by acowley):

 Replying to [comment:12 thomie]:
 > Potentially confusing things about these proposals, assuming full
 backward compatibility:
 >
 > ||= proposal =||= H2010 syntax =||= new syntax =||= Why confusing? =||
 > ||= acowley =|| **import A as B (x)** || **import A (x) as B** || look
 similar, do different things ||


 Just to chime in to confirm that this is the most ripe for confusion part
 of the proposal. No semantics of working code change with the extension
 enabled, but this point of confusion is introduced. For context, the
 syntax `import A as B (x)` is used in 0.3% of all `import` statements over
 all the code in the Stackage package set.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10478#comment:16>
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