bug#61874: 30.0.50; Flyspell only changes

[Juri Linkov]

close 61874 30.0.50
thanks

> This feature is the opposite of the feature implemented by Augusto in
> bug#61814.  The problem is that the default behavior of flyspell-mode
> is too erratic.  It checks and highlights random words where the cursor
> happens to travel while navigating the buffer.  The feature from Augusto
> allows to check all words in the buffer that makes sense when the intention
> of the user is to see all misspelled words to correct them.
>
> OTOH, often there is no need to check all misspellings in the existing file,
> but only newly entered text.  For such use cases extra highlighting
> while moving thru the file causes too much distraction.  So here is
> a new option that allow to check only text edited by the user.

Now after a long period of testing pushed and closed.