Last modified: 2014-10-03 19:53:17 UTC
This bug has been observed for a while on fr.wp and thus unofficially reported time ago, but now User:Drongou has kindly provided instructions to replicate it, so: 1) Copy/paste something between square brackets, say [[2013]] 2) Place the cursor before the 3 and type 4, so that it becomes [[20143]] 3) Type a space, so it now looks like [[2014 3]] 4) Remove the 3 and save. The result will be <nowiki>[[2014 ]]</nowiki>. Confirmed at least on Safari 7.1, Mac OS-X 10.9 .
This is already covered in bug 52037 – it's really messy, yeah. *** This bug has been marked as a duplicate of bug 52037 ***