Topic on Extension talk:CodeMirror

Some invisible characters like non-breaking spaces or soft hyphens are shown as red dots. See e.g. phab:T181677 or https://stackoverflow.com/a/19269811.

MW 1.31.1, Code Mirror 4.0.0 (a435d54) 22:01, 26. Apr. 2018

Sometimes there is a red dot beneath a category link. What does it mean?

I don't think CodeMirror has any feature which produces a red dot under category links. Although a screenshot would help.

Editor with CodeMirror off:

CodeMirror activated:

At the moment, this is the first and only where it happens.

@Alzi24 Thanks for the screenshots! I tried to reproduce this with the same categories on a random page but I didn't see the dot. Can you give me a link to the page you are editing with? I tried figuring it out from the screenshots but searches on dewiki turned up nothing for Aracyclin. :)

This is a deliberate feature of codemirror. It highlights some invisible characters..

@NKohli (WMF): Our wiki URL is https://www.perrypedia.proc.org Don't know what dewiki is, our article pages usually appear high-ranked in most search engines, as long as they are no trivial terms out of the real life.

@IP: I have no idea how it could happen that someone inserted invisible characters. Anyway, you've answered my question and our simple solution is: remove characters, save page.

Thanks to all!