Some non-breaking spaces are converted to ` ` by seemingly unrelated edits performed by WikEd ([[https://en.wikipedia.org/w/index.php?title=Parkinson%27s_disease&type=revision&diff=791796008&oldid=791791493|example]]).
Discussed here:
* https://en.wikipedia.org/wiki/User_talk:WhatamIdoing#Hard_spaces
* [[https://en.wikipedia.org/wiki/User_talk:Cacycle/wikEd/index.php?oldid=817123554#Stop_adding_ |https://en.wikipedia.org/wiki/User_talk:Cacycle/wikEd#Stop_adding_ ]]
* https://en.wikipedia.org/w/index.php?&oldid=817326506#Non_breaking_spaces
Summary:
It seems that when content is copied from a page that was edited with VE, nbsp characters are added to the clipboardin "Read" mode, which thus sneak into the wikicode version as people copy the contentand then pasted into a wikicode editor."Edit" mode, While this is NOT proper copy paste behaviour for article contentnbsp characters are added to the clipboard, it is commonwhich thus sneak into the wikicode version as people copy the content into a wikicode editor. As people later on use WikEd to visit, these characters get converted to their entity representation, which makes them more noticeable to people.
Unanswered questions:
# Which browsers are affected (At least Chrome v62)
# Does this happen when copying from the edit surface, from the Read view AFTER saving with VE or the preview surface ?