* doc/lispref/os.texi (User Identification):
Remove extraneous detail about user-mail-address.
@end defvar
@defopt user-mail-address
-This holds the nominal email address of the user who is using Emacs.
-Emacs normally sets this variable to a default value after reading your
-init files, but not if you have already set it. So you can set the
-variable to some other value in your init file if you do not
-want to use the default value.
+This holds the email address of the user who is using Emacs.
@end defopt
@defun user-login-name &optional uid