stubbornella/csslint — pull request #275 by mahonnaise (2012-05-14 00:20:55+00:00)
Title: Rule: font and font-family declarations should always end with sans-serif, serif, or monospace

People often forget to add a generic font if they are using web fonts.

Typos can happen as well. E.g. letters are switched around or - what I just saw a few hours ago - the dash in "sans-serif" is sometimes forgotten.

`cursive` isn't allowed, because this often means Comic Sans. `fantasy` was also kicked, because it's either garbage or the browser ignores it and pretends it's the same as `sans-serif`. Only `sans-serif`, `serif`, and `monospace` are safe options.