Ubuntu, got it from Google Fonts.
I thought it might the font problem too, but I don’t know where to begin…
Now when I do things like “hello”, the beginning quote appears as 8 while the ending quote appears as 9.
So I thought it was Google Doc issue, I tried pasting something from TextEdit and it still showed up funky. I suspect it must be what I did in editor-style.css… prior to changing it, the quotes showed up fine.