I first noticed this in Chapter 3, though I have a second occurrence of the problem when working through Chapter 4: when writing the
@font-face style block in my CSS, I get an error from CSSLint
@font-face does declaration doesn't follow the the fontspring bulletproof syntax.
There is a URL in the tooltip when I click the orange dot. (http://blog.fontspring.com/2011/02/the-new-bulletproof-font-face-syntax/) This page describes the “new” (2011) format, but it doesn’t give me a clue as to what is wrong with my styling. The MDN page on @font-face wasn’t helpful either.
I am using Atom 1.10.2 on OS X El Capitan (10.11.6) and