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what's intangibility in move-end-of-line?


From: Xah Lee
Subject: what's intangibility in move-end-of-line?
Date: Sat, 6 Dec 2008 15:49:43 -0800 (PST)
User-agent: G2/1.0

 aboutin the inline doc for move-end-of-line, it says:

«
move-end-of-line is an interactive compiled Lisp function in
`simple.el'.
It is bound to M-D.
(move-end-of-line arg)

Move point to end of current line as displayed.
(If there's an image in the line, this disregards newlines
which are part of the text that the image rests on.)

With argument arg not nil or 1, move forward arg - 1 lines first.
If point reaches the beginning or end of buffer, it stops there.
To ignore intangibility, bind `inhibit-point-motion-hooks' to t.
»

this seems unclear to me. What is this intangibility? looking up on
inhibit-point-motion-hooks does not seems to clear up. It seems about
some properties in lisp symbols.

I need to use this in elisp code. Not sure if it is proper to use in
elisp code.

Thanks.

  Xah
∑ http://xahlee.org/

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