DEFVAR_PER_BUFFER ("selective-display", ¤t_buffer->selective_display,
Qnil,
doc: /* Non-nil enables selective display.
-An Integer N as value means display only lines
-that start with less than n columns of space.
+An integer N as value means display only lines
+that start with less than N columns of space.
A value of t means that the character ^M makes itself and
all the rest of the line invisible; also, when saving the buffer
in a file, save the ^M as a newline. */);