The link is actually present in the 'Jump To' list, but not in the tables in the top description of the module content. This is a problem as it's very easy to skip its presence, as a person is focused in exploring the module functionality reading the module description, while the refRange and companions are at the very bottom of the web page right now.
https://github.com/D-Programming-Language/phobos/pull/1522
Commit pushed to master at https://github.com/D-Programming-Language/phobos https://github.com/D-Programming-Language/phobos/commit/f3e8844b3d0d00def99d7c9118497a0b699c6df1 Merge pull request #1522 from quickfur/issue10885 Add RefRange to ddoc overview (issue 10885)