When exporting a wiki page as PDF, the PDF file contains a section called "License". At least for pages under a Creative Commons License, this includes an URL to the text of the license. This URL is plain text (not hyperlinked) and contains no protocol specifier (//creativecommons.org/licenses/by-sa/3.0/
instead of http://creativecommons.org/licenses/by-sa/3.0/).
While this may be an instance of protocol neutral links, I think that it would be more helpful if these were complete links (starting with either http:// or https://). Browsers generally seem to interpret links starting with a slash as file:// links (at least on Linux).
How to reproduce:
- Go to http://www.mediawiki.org/ or http://en.wikipedia.org/.
- In the sidebar, click "Print/export" and then "Download as PDF"
- Wait for the rendering to finish and download the PDF
- Open the PDF file, scroll to the last page and look at the "License" section