Description of `buffer-invisibility-spec' in info page

[Herbert Euler]

Description of `buffer-invisibility-spec' in info page
(info "(elisp) Invisible Text") is subtlely misleading.  For a cons cell,
it says:

`(ATOM . t)'
      A character is invisible if its `invisible' property
      value is ATOM or if it is a list with ATOM as a member.
      Moreover, if this character is at the end of a line and
      is followed by a visible newline, it displays an
      ellipsis.

But "at the end of a line" and "followed by a visible newline" are not
necessary.  For example, evaluating the following expressions gets
an ellipsis in the *scratch* buffer:

(add-to-invisibility-spec '(with-ellipsis . t))

(make-overlay 1 3)

(let ((o (car (overlays-at 1))))
 (overlay-put o 'invisible 'with-ellipsis))

Regards,
Guanpeng Xu

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