gtk-text-buffer-delete (buffer start end &key interactive default-editable)
Deletes text between start and end. The order of start and end is not actually relevant; gtk-text-buffer-delete will reorder them. This function actually emits the "delete-range" signal, and the default handler of that signal deletes the text. Because the buffer is modified, all outstanding iterators become invalid after calling this function; however, the start and end will be re-initialized to point to the location where text was deleted.