Last modified: 2014-07-28 18:36:40 UTC
https://en.m.wikipedia.org/w/index.php?title=Human_trafficking_in_Turkmenistan&campaign=mobile-mainpage-keepgoing-links says: Where the title of an existing page is mentioned, enclose it in double brackets but this should only be done for the first occurrence of the link. A very important detail of the linkage guidelines of English Wikipedia.
Prioritization and scheduling of this bug is tracked on Trello card https://trello.com/c/lwJaVjd9
This was just an experimental feature that didn't get a whole lot of product or design love :) We'll be removing it since it didn't generate much usable data.
This feature was removed in https://gerrit.wikimedia.org/r/#/c/147345/