was listed as containing mis-nested tags:-
https://en.wikisource.org/w/index.php?title=Special:LintErrors/misnested-tag&dir=prev
however, when clicking the edit link provided, the usual highlighting which would enable location of the error, did not appear It would therefore be more sensible in some instances to provide a diff like indication of the text on either side of the erorr directly in a box-out to enable the error to be located using browser search boxes..