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(gnus)Article Signature

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Article Signature
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   Each article is divided into two parts--the head and the body.  The
body can be divided into a signature part and a text part.  The variable
that says what is to be considered a signature is
`gnus-signature-separator'.  This is normally the standard `^-- $' as
mandated by son-of-RFC 1036.  However, many people use non-standard
signature separators, so this variable can also be a list of regular
expressions to be tested, one by one.  (Searches are done from the end
of the body towards the beginning.)  One likely value is:

     (setq gnus-signature-separator
           '("^-- $"         ; The standard
             "^-- *$"        ; A common mangling
             "^-------*$"    ; Many people just use a looong
                             ; line of dashes.  Shame!
             "^ *--------*$" ; Double-shame!
             "^________*$"   ; Underscores are also popular
             "^========*$")) ; Pervert!

   The more permissive you are, the more likely it is that you'll get
false positives.

   `gnus-signature-limit' provides a limit to what is considered a
signature when displaying articles.

  1. If it is an integer, no signature may be longer (in characters)
     than that integer.

  2. If it is a floating point number, no signature may be longer (in
     lines) than that number.

  3. If it is a function, the function will be called without any
     parameters, and if it returns `nil', there is no signature in the
     buffer.

  4. If it is a string, it will be used as a regexp.  If it matches,
     the text in question is not a signature.

   This variable can also be a list where the elements may be of the
types listed above.  Here's an example:

     (setq gnus-signature-limit
           '(200.0 "^---*Forwarded article"))

   This means that if there are more than 200 lines after the signature
separator, or the text after the signature separator is matched by the
regular expression `^---*Forwarded article', then it isn't a signature
after all.