[GHC] #8715: Prompt stays at | instead of going back to > when pressing C-c in multi-line blocks.

[GHC]

#8715: Prompt stays at | instead of going back to > when pressing C-c in multi-
line blocks.
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       Reporter:  RobinHoksbergen          |             Owner:
           Type:  bug                      |            Status:  new
       Priority:  low                      |         Milestone:
      Component:  GHCi                     |           Version:  7.6.3
       Keywords:                           |  Operating System:  Linux
   Architecture:  x86_64 (amd64)           |   Type of failure:  Other
     Difficulty:  Easy (less than 1 hour)  |         Test Case:
     Blocked By:                           |          Blocking:
Related Tickets:                           |
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 Starting a block of code in GHCi is done by writing :{, upon which the
 prompt changes from '>' to '|'. Pressing C-c cancels the block of code,
 but the '|' prompt remains. This can be somewhat confusing in that it
 appears GHCi is still stuck in the current block of code, but returns an
 "unknown command ':}'" when trying to close it.

 Reproduction steps:
 * Run GHCi
 * Start a multi-line block with ':{'
 * (Optional) Write some code.
 * Close the block with C-c.
 * The block will now be closed, but the prompt remains.

 Opening and closing a new block using the same syntax did not solve the
 problem.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8715>
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