delete
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.
Parameters
start
a position in @buffer
end
another position in @buffer