That's very helpful. I have to point out that there is no default binding for normal-width ｢corner quotes｣ (U+FF62 and U+FF63) in vim, although 「double-width」 ones (U+300C and U+300D) are available. Also, the vim documentation page (vimdoc.sourceforge.net/htmldoc/digraph.html) is served with no encoding specified, so you might have to manually set the encoding to read it properly. That's pretty hilarious.