Sean (on IRC) convinced me that something called *Iterator had better
implement Iterator interface (which TextIterator currently does not).
So changing method signatures is out of the question. Towards that, the
current functions will stay as they are, but I'll have to add
current_offset() (for
I am working on implementing BreakIterator API [1]. I considered two
approaches: making a separate class or merging the API into the
existing TextIterator. Having a separate class would be a bit cleaner,
but I can see people wanting to use it in foreach(), and since
TextIterator already provide
