Fix broken Emmet
Summary:
- Improve warning message with line number
BUG: 386151
Reviewers: KTextEditor, dhaumann
Reviewed By: KTextEditor, dhaumann
Subscribers: dhaumann, carewolf, kwrite-devel, kde-frameworks-devel, KTextEditor
Tags: Kate, Frameworks
Differential Revision: https://phabricator.kde.org/D17970