[GHC] #10021: Add "Error:" prefix for compile-time error messages

[GHC]

#10021: Add "Error:" prefix for compile-time error messages
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        Reporter:  k-bx              |                   Owner:  k-bx
            Type:  feature request   |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  Compiler          |                 Version:  7.8.4
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  None/Unknown      |  Unknown/Multiple
      Blocked By:                    |               Test Case:
 Related Tickets:                    |                Blocking:
                                     |  Differential Revisions:
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Comment (by Austin Seipp <austin@…>):

 In [changeset:"7febc2bb86b238713cfb9f52dff32039464dfe66/ghc"]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="7febc2bb86b238713cfb9f52dff32039464dfe66"
 Add "error:" prefix to error-messages

 Add "error:" prefix to error-messages, also lowercase "Warning:"
 message to match GCC behavior closer.

 Reviewed By: thomie, austin

 Differential Revision: https://phabricator.haskell.org/D811

 GHC Trac Issues: #10021
 }}}

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10021#comment:18>
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