[GHC] #11418: Suggest correct spelling when module is not found because of typo

[GHC]

#11418: Suggest correct spelling when module is not found because of typo
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        Reporter:  syd               |                Owner:
            Type:  feature request   |               Status:  new
        Priority:  lowest            |            Milestone:
       Component:  Compiler          |              Version:
      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 thomie):

 * Would ghc scan subdirectories as well (recursively?), when creating the
 map?

 * Would ghc persist this map to disk? (so it could be used on the next
 `ghc --make` run)

 * You mentioned a trade-off before. What would the other side of the
 trade-off look like?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11418#comment:16>
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