In the page: http://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html#lists
The link contained here "On their own, lists don’t do much, but the Sass list functions make them useful."
points to a wrong page: http://sass-lang.com/docs/yardoc/file.Functions.html#list-functions
Replicated this issue, did a google search to find the real content. But found this bug :)
Seems to be the correct URL for anyone else googleing
Fix links to the Sass list function documentation.