Package:  emacs

	While enriched-encode already sets inhibit-read-only to t to
	avoid issues with any text bearing the read-only property [1] in
	the encoded part, it doesn’t yet set inhibit-point-motion-hooks,
	which easily results in incorrect encoding should text being
	encoded contain parts protected with the ‘intangible’ property.

	Example:

(with-temp-buffer
  (insert "Hello, world!\n")
  (re-search-backward "\\<")
  (put-text-property (point) (point-max) 'intangible t)
  (put-text-property (+ -1 (point)) (+ 1 (point)) 'face 'bold)
  (put-text-property (+  2 (point)) (+ 3 (point)) 'face 'italic)
  (enriched-encode (point-min) (point-max) nil)
  (buffer-substring-no-properties (point-min) (point-max)))
"Content-Type: text/enriched
Text-Width: 72

Hello,<bold> <</bold>italic>world!
</italic>"

	With the trivial patch MIMEd, this results in the following
	(correct) string instead:

"Content-Type: text/enriched
Text-Width: 72

Hello,<bold> w</bold>o<italic>r</italic>ld!
"

[1] http://www.gnu.org/software/emacs/manual/html_node/elisp/Special-Properties.html

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