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(sc)Emacs 18 MUAs

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GNUS, RMAIL, PCMAIL, RNEWS with Emacs 18 or Epoch 4
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   These MUAs use Emacs' built-in yanking and citing routines,
contained in the `sendmail.el' file.  `sendmail.el' for Emacs 18, and
its derivative Epoch 4, do not know anything about the citation
interface required by Supercite.  To connect Supercite to any of these
MUAs under Emacs 18 or Epoch 4, you should first Note: Overloading for
Non-conforming MUAs.  Then follow the directions for using these MUAs
under Emacs 19.  Note: Emacs 19 MUAs.

   Note that those instructions will tell you to use the function
`add-hook'. This function is new with Emacs 19 and you will not have it
by default if you are running Emacs 18 or Epoch 4.  You can either
substitute the appropriate call to `setq', or you can use the
`add-hook' function that is provided in the `sc-unsupp.el' file of
unsupported Supercite hacks and ideas.  Or you can upgrade to some
Emacs 19 variant!  :-)

   To use `setq' instead of `add-hook', you would, for example, change
this:

     (add-hook 'mail-citation-hook 'sc-cite-original)

   to:

     (setq mail-citation-hook 'sc-cite-original)

   Note the lack of of a single quote on the first argument to `setq'.