Last modified: 2013-07-30 17:32:44 UTC
When an unmatched literal square bracket is used in the title of a reference, Parsoid or VisualEditor encloses it in a nowiki tag. Example on the live wiki: https://en.wikipedia.org/w/index.php?title=Wikipedia&diff=566045928&oldid=566042453#cite_ref-209 (line 360) Examples in testing: https://en.wikipedia.org/w/index.php?title=User%3AThryduulf%2Fsandbox&diff=566402676&oldid=566401436 It is possible this is a reappearance of or related to Bug 43067
Yes, this is a known problem. There are two different forms of nowiki escaping that goes on in Parsoid. One is applied to text strings (the common kind that appears around [[foo]] when typed literally). The one in this bug report is applied to transclusion parameters to prevent literal characters messing up transclusion parse. Ex: If {{tpl|foo|bar}} is editd to {{tpl|[[foo|bar]]}}, then the "[[foo" and "bar]]" have to be wrapped in nowikis to prevent "[[foo|bar]]" from being parsed as a wikilink. The current limitation of this second form of nowiki escaping is that it only checks arguments one at a time. So, it conservatively escapes "[foo" in one argument right now without looking at the global context of all arguments which is why you see the nowiki escapes there. To be fixed.
