This edit:

https://en.wikipedia.org/w/index.php?title=Percy_Jackson:_Sea_of_Monsters&diff=562794756&oldid=562792500

is an example of a dirty diff where VisualEditor/Parsoid appears to have wrapped <nowiki> tags around existing <nowiki> content (in this case the "|" symbol in the title of a cited website) inside a template inside a reference.

Version: unspecified
Severity: normal