The _graceful_ should fail less when the `.editorconfig` file isn't
properly written, e.g. boolean values from YAML or unparseable numbers
(when a number is expected). As is... information is lost as the
_warning_ (a go-multierror.Error) is ignored. If anybody knows how to
send them to the UI as warning; any help is appreciated.
Closes#20694
Signed-off-by: Yoan Blanc <yoan@dosimple.ch>
