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Richard M. Stallman authored
(set_point): Considerable rewrite. Handle intervals both before and after the old and new point values. Redo handling of invisible intervals, and of motion hooks. (textget): New function. (graft_intervals_into_buffer): create_root_interval needs Lisp object arg. Set tree to new root interval. Don't test TREE_LENGTH if buffer has no intervals. Rearrange code to copy properties so that it really does merge the inserted ones into the inherited ones. (traverse_intervals): Pass `arg' on recursive calls. (split_interval_left): Use new_length as basis for length of new. (traverse_intervals): New arg ARG.
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