Variable: selective-display-ellipses
selective-display-ellipses is a customizable and buffer-local variable
defined in buffer.c.
Documentation
Non-nil means display ... on previous line when a line is invisible.
Probably introduced at or before Emacs version 18.
Source Code
// Defined in /usr/src/emacs/src/buffer.c
DEFVAR_PER_BUFFER ("selective-display-ellipses",
&BVAR (current_buffer, selective_display_ellipses),
Qnil,
doc: /* Non-nil means display ... on previous line when a line is invisible. */);