Because MediaWiki automatically places a non-breaking space before a percentage sign

Since when? :D Are you sure? What page was it on?

In T181441#3791155, @Izno wrote:

Because MediaWiki automatically places a non-breaking space before a percentage sign

Since when? :D Are you sure?

I'm really sure it does, I even had some discussions about this back when I couldn't beliebe it myself.

What page was it on?

I think it is a gerneral issue. To be honest, I can't tell anymore where exactly I noticed it.

In T181441#3794525, @MGChecker wrote:

In T181441#3791155, @Izno wrote:

Because MediaWiki automatically places a non-breaking space before a percentage sign

Since when? :D Are you sure?

I'm really sure it does, I even had some discussions about this back when I couldn't beliebe it myself.

What page was it on?

I think it is a gerneral issue. To be honest, I can't tell anymore where exactly I noticed it.

See, the reason I'm asking the question is because I've been on the projects for 10 years or so at this point and I can't recall any discussion where a non-breaking space was being generated by MediaWiki, and especially not where the percent sign was causing it, except in the context of e.g. Template:Convert, which is obviously not core.

You're going to need to see if you can provide us an example of the issue if you truly believe it's MediaWiki.

I orchestrated an example that should show the issue on every device: https://de.wikipedia.org/wiki/Benutzer:MGChecker/Percent . In the App, the Spaces between the 20 and the % are breaking, on the actual site they aren't.

Huh. Added in T12334: Replace normal spaces before percent (%) signs with non-breaking spaces, 2007. I wonder if this is behavior that should
actually be in core. (Other documentation at T74941#794299 .)

Related tasks are closed, looks like there's nothing for the Android team to do here, so am removing from Android Backlog. Feel free to re-add if action is needed.

Well, did the example in T181441#3798312 get retested...? If not than there's something for an Android dev to do. If yes than this task should get closed instead.

I just retested it, the behavior hasn't been fixed at all. This isn't happening on normal view, so it's definitely an Android app issue.

I agree with @Arlolra's resolution as dup. The "french space" armoring was tweaked in T197902, but has always added non-breaking spaces before ?:;!%». Parsoid hasn't ever really supported this properly.