Its far to difficult to post an image, so I'll just have to describe this... When I use the visual editor I see the edit text contains many instances of a "down and to the left arrow", commonly used to indicate a carriage return (or CRLF for those Windows users reading this). Yet these are in places that clearly are not CR's.
If you would like to see an example, edit the en.wiki article on AI winter and look for the term "technologies developed by". This paragraph has a number of links to other articles, and a number of these CR characters.
I think they are being used to indicate links to other Wiki articles or links in. If this is the case, bad programmer, no donut! I think these need to be changed, whatever the meaning is supposed to be.
p.s. Normally I would link to the article I mention, but I can't - this editor does not appear to allow links to other Wikis.