If someone installed MediaWiki in the web root directory (public_html folder), and now trying to created a robots.txt file for the website; they he surely can't use "Disallow: /w/" in robots.txt file.
So, what should he put there- "Disallow: /" ? According to the guide to create robots.txt file in this section - Manual:Robots.txt#Prevent indexing of non-article pages.
Thank you.