after-insert (augmentable only) in text%

Called after items are inserted into the editor (and after the display is refreshed; use on-insert and begin-edit-sequence to avoid extra refreshes when after-insert modifies the editor).

See also can-insert? and on-edit-sequence.

No internals locks are set when this method is called.

• (send a-text after-insert start len) -> void
     start : exact non-negative integer
     len : exact non-negative integer

  The start argument specifies the position of the insert. The len argument specifies the total length (in positions) of the inserted items.