[GHC] #10989: :ctags and :etags command can receive haskell source files as a parameter

[GHC]

#10989: :ctags and :etags command can receive haskell source files as a parameter
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        Reporter:  hugomg            |                Owner:  tvv
            Type:  feature request   |               Status:  upstream
        Priority:  normal            |            Milestone:  8.0.1
       Component:  GHCi              |              Version:  7.10.2
      Resolution:                    |             Keywords:  newcomer
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D1471
       Wiki Page:                    |
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Comment (by Austin Seipp <austin@…>):

 In [changeset:"a689c8edb1639669cb8df58092b8b77a0a581717/ghc"
 a689c8ed/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="a689c8edb1639669cb8df58092b8b77a0a581717"
 ghci: don't let ctags/etags overwrite source files

 A ource file which was accidently passed as parameter into `:ctags` or
 `:etags`
 can be overwritten by tag data. This patch updates documentation to avoid
 confusion in commands usage and prevents `collateAndWriteTags` from
 modifying
 existing source files.

 Reviewed By: thomie, bgamari, austin

 Differential Revision: https://phabricator.haskell.org/D1471

 GHC Trac Issues: #10989
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10989#comment:7>
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