GitLab

	* textmodes/flyspell.el (flyspell-highlight-incorrect-region):
	Ignore the read-only property when flyspell highlighting is on.
	Not ignoring it leads to a series of confusing errors.
	(flyspell-highlight-duplicate-region): Ignore read-only, as above,
	but also make sure to call flyspell-incorrect-hook.
	(flyspell-maybe-correct-transposition): Perform transposition test
	by bit twiddling a string, rather than using a temp buffer.
	(flyspell-maybe-correct-doubling): Use a string rather than a temp
	buffer.  This is also the original version of the code, which
	could not be checked in before due to a previous lack of
	assignment papers.  This version has seen heavy usage on my system
	for several years now.