Re: moving point over invisible and intangible text

[Luc Teirlinck]

Richard Stallman wrote:

   Are they exactly identical in terms of which positions of point
   are not allowed, and which positions they move point to?
   If not, what are the precise differences?

Given:

line1
line2
line3
line4

Buffer starting at line1, no trailing whitespace.  With line2
including trailing newline invisible or invisible-intangible, both
implementations disallow positions 8-13 inclusive.  Both move point
from 7 to 14 going forward and from 14 to 7 backward.

Sincerely,

Luc.