Kerning pairs?

[davidmerfield]

Add option to wrap a sequence of characters in a node which could be targeted? This would not be default behaviour and is naturally dependent on the typeface e.g.

typeset("Ave, Imperator, morituri te salutant", {kern: ["av", "at"]}) 

.kern-av {letter-spacing: 0.96em}
.kern-at {letter-spacing: 0.98em}