[Hackage] #877: Cabal config breaks on Windows with username "{"

[Hackage]

#877: Cabal config breaks on Windows with username "{"
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  Reporter:  guest            |        Owner:          
      Type:  defect           |       Status:  new     
  Priority:  normal           |    Milestone:          
 Component:  Cabal library    |      Version:  1.10.1.0
  Severity:  major            |     Keywords:  escaping
Difficulty:  easy (<4 hours)  |   Ghcversion:          
  Platform:                   |  
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Comment(by elga):

 * [http://www.releve-identite-operateur.fr/numbero-de-virgin-mobile.html
 virgin mobile]

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Ticket URL: <http://hackage.haskell.org/trac/hackage/ticket/877#comment:1>
Hackage <http://haskell.org/cabal/>
Hackage: Cabal and related projects