[GHC] #15291: Incorrect SCC name parsing according to user manual

[GHC]

#15291: Incorrect SCC name parsing according to user manual
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        Reporter:  osa1              |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:  8.6.1
       Component:  Compiler          |              Version:  8.5
      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 osa1):

 FWIW, here's a 10-years-old program that uses SCC names with spaces:
 https://github.com/haskell/bytestring/blob/master/tests/Bench.hs

 It seems like GHC used to accept this.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15291#comment:1>
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