Presently, robots.txt has Disallow: /w/ Thus, the raw wikitext of pages isn't accessible via the Internet Archive; see e.g. https://web.archive.org/web/20140307111730/http://en.wikipedia.org/w/index.php?title=Main_Page&action=raw
This is in contrast to sites like WikiIndex, which allow it: https://web.archive.org/web/20131021230044/http://wikiindex.org/index.php?title=Welcome&action=raw
We should allow the Internet Archiver to index these pages so that the raw wikitext will be available for future generations, even if the page goes away. See [[mw:Manual:Robots.txt#Allow_indexing_of_raw_pages_by_the_Internet_Archiver]].
Version: wmf-deployment
Severity: enhancement