If we try to creat the Good and Features articles on Czech Wikipedie, we have several typographical rules, what kind of peaces of text cannot be on the end of the line. So normally in wikitext, we were adding entity. But there is still no way how to do it in VisualEditor. I dont think the future newbies will use wikitext much, tu be able to do this.
I guess other languages also uses non-breakable space in certain moments.
And I guess that other pair characters should work on the same principle, such as: »« (and I dont see others in my special character menu - but if they are...).
This is a dupe of https://phabricator.wikimedia.org/T70429 and/or https://phabricator.wikimedia.org/T53045 . Juandev, if your wiki lacks the "»«" marks in the special character inserter, please see here. Thanks!
@Elitre: Feel free to go to T70429: VisualEditor: Add non-breaking space (nbsp) to the "special character" dialog and use "Merge Duplicates In" if you're sure. :)