Oh, by the way, since we're making ssyntax reader-level, I might be able to get more powerful ssyntax as well. For instance, " works by consuming the stream until it finds a matching " Ditto for [] and () etc. This behavior hopefully wouldn't be too hard to add, though I'm not sure what the Arc interface to it would be like.
I probably wouldn't be able to move the defaults for "" [] () into Arc, though, because they call Python functions/classes that I don't particularly want to expose to Arc.
