On 10/4/2015 4:14 PM, Richard Wordingham wrote:
respect to what to erase or undo.

      
For sequences that belong to a given language, you can pick the
behavior that makes most sense in them, but for lone surrogates, by
definition you are dealing with broken text that doesn't follow any
conventions.
Who's 'you'?  Customisation is frequently not available.  In fact, I
don't recall seeing it on offer.

The UI developer.

And there's nothing Unicode can do about lack of customizability.

A,./


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