If you save an entire article that's in digest format by using the
`s' command, you won't be able to split it after it's in its save
folder.  This is because the internal message headers are escaped
(usually with a tilde (~)).  The trick for saving a digest so that it
is split in the save folder is to do the following while reading the
unsplit digest.

  Type
  ====
  s
  ^U ^U
  |cat > +FolderName

With this command, the internal headers won't be escaped, and each
sub-message will be presented as an individual message when you view
it with a folder reader like nn, pine, or elm.

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