Last modified: 2014-09-11 18:09:48 UTC
https://en.wikipedia.org/w/index.php?diff=622971449&oldid=620207209 added a stray character to the top of the page. The first two lines became: Ǫ__NOTOC__ {{Infobox_Disease | After this, it wasn't possible to change the table of contents setting, and it wasn't possible to select the stray "Ǫ" to remove it in the normal way. Instead, clicking on the stray character highlighted that line plus the infobox. To edit it, you had to open the "template", where this was treated as "Content" in a complex transclusion, rather than being unrelated text and wikitext.
Change 159624 had a related patch set uploaded by Arlolra: Be careful about closing open p tags around meta markers https://gerrit.wikimedia.org/r/159624
Change 159624 merged by jenkins-bot: Be careful about closing open p tags around meta markers https://gerrit.wikimedia.org/r/159624