This seems to be a mistake. The original documentation, from 2013, reads:
The World Wide Web was built over the Hypertext Transfer Protocol (HTTP) and the Hypertext Markup Language (HTML). A User Agent, like a web browser, uses HTTP to request a HTML document. The browser then formats and displays the document to its user. HTTP is used to transport more than HTML, but HTML is the lingua franca of the Web and web applications.
It was mangled badly in this commit. I'd suggest reporting a bug, and maybe submitting a patch to restore the original wording.