(gnus-button-prefer-mid-or-mail): Fix typo in docstring.

diff --git a/lisp/gnus/gnus-art.el b/lisp/gnus/gnus-art.el
index e757406f00d43a48dcb5b4a69db0feafb5844264..c6ac13af6c9e82f2b2596be34b3b2f45f26da9da 100644 (file)
--- a/lisp/gnus/gnus-art.el
+++ b/lisp/gnus/gnus-art.el
@@ -6238,7 +6238,7 @@ Strings like this can be either a message ID or a mail address.  If it is one
 of the symbols `mid' or `mail', Gnus will always assume that the string is a
 message ID or a mail address, respectively.  If this variable is set to the
 symbol `ask', always query the user what do do.  If it is a function, this
-function will be called with the string as it's only argument.  The function
+function will be called with the string as its only argument.  The function
 must return `mid', `mail', `invalid' or `ask'."
   :version "22.1"
   :group 'gnus-article-buttons