[nhc-bugs] the format of error diagnostics

[Feliks Kluzniak]

Hello,

nhc98 would be much more convenient to use if the error diagnostics were
compatible with Emacs compile mode.

In other words, instead of

   nhc98    -c -d ../nhc Flatten.hs
   
   ====================================
   	Error when renaming::
   Constructor OK used at 833:6 is not defined.


it would be nice to have the message appear as

   Flatten.hs:833:6: Error when renaming::
   Constructor OK is not defined.

Regards,
-- F.