https://www.qppstudio.net/webhelp_xe3/non-breaking-spaces.htm
Appendices Typography Special Characters Nonbreaking Space
Q++Studio XE3 Diary and Calendar Publishing System - The special characters token for non-breaking spaces is
special charactersnonbreaking spaceappendicestypography
https://epubsecrets.com/tag/nonbreaking-space
nonbreaking space | EPUBSecrets
nonbreaking space
https://www.tiny.cloud/docs/tinymce/5/nonbreaking/
Nonbreaking Space plugin | TinyMCE Documentation
Insert a nonbreaking space.
nonbreaking spacetinymce documentationplugin