The delete_range signal is emitted to delete a range from a TextBuffer.
Note that if your handler runs before the default handler it must not invalidate the start and end iters (or
has to revalidate them). The default signal handler revalidates the start and end iters to both point to the
location where text was deleted. Handlers which run after the default handler (see connect_after) do
not have access to the deleted text.
See also: @delete.
| start |
the start of the range to be deleted |
| end |
the end of the range to be deleted |