Initializes iter with the “end iterator,” one past the last valid
character in the text buffer. If dereferenced with
gtk.text_iter.TextIter.getChar, the end iterator has a character value of 0.
The entire buffer lies in the range from the first position in
the buffer (call gtk.text_buffer.TextBuffer.getStartIter to get
character position 0) to the end iterator.
Initializes iter with the “end iterator,” one past the last valid character in the text buffer. If dereferenced with gtk.text_iter.TextIter.getChar, the end iterator has a character value of 0. The entire buffer lies in the range from the first position in the buffer (call gtk.text_buffer.TextBuffer.getStartIter to get character position 0) to the end iterator.