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 g_signal_connect_after()) do not have access to
the deleted text.
Emitted to delete a range from a GtkTextBuffer.
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 g_signal_connect_after()) do not have access to the deleted text.
See also: [method@Gtk.TextBuffer.delete].