after-insert (augmentable only) in pasteboard%

Called after a snip is 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-pasteboard after-insert snip before x y) -> void
     snip : snip% object
     before : snip% object or #f
   x : real number
     y : real number