* lisp/textmodes/flyspell.el
(flyspell-check-previous-highlighted-word): Really accept a
numeric argument, as the doc string describes. Fix an off-by-one
error in looking up overlays, so invocation with point immediately
after a word would check that word. Clarify the doc string as
Suggested by N. Jackson <nljlistbox2@gmail.com>. (Bug#21129)