Suggest to remove unmatched issueHandlers

[williamdes]

<LessSpecificReturnType errorLevel="info" /> I had added some ignore errors and they got unused.

I would suggest that like phpstan has you add something to report the unmatched issueHandlers
Like I did on phpmyadmin/phpmyadmin@29bbf03

And 2nd possible feature: suggest to the user to make the rule file specific if it hits only x files
So the user can stop propagating error y on more files than x without knowing it

Thank you for the tool, I am adding it to phpMyAdmin dev tools !
phpmyadmin/phpmyadmin#16100

[williamdes]

Hi @muglug
Do you think this feature would be usefull ?

[robchett]

Unused issue handler PR added in #10341.

It won't suggest narrowing the list of files/directories but I think it could fairly easily be expanded to do so by breaking up the issue handler into multiple when parsing them from the XM.

[weirdan]

Fixed, as per above.