Make links in comments underlined on hover in Safari
Make links in comments underlined on hover in Safari

Safari 8 has a bug with the a:not(:link):not(:visited) selector we were
using previously (see https://bugs.webkit.org/show_bug.cgi?id=142737).
Now we use a:not([href]) instead, which should cover all of the cases we
care about (namely, <a name="foo"> elements explicitly created using
HTML syntax in Markdown).

df2k2/markdown