tkinter.Text.count(index1, index2) returns None not (0,) when index1 equals index2

Surely the Text.count() method should return (0,) in the title code snippet? Following the example of what happens when more than one option is given.

I suppose the text_count method should do so too, but it was a hack of something that did not exist when written.

Tk8.6 documentation says a list of integers is returned.

Sample code below.

import tkinter


def text_count(widget, index1, index2, *options):
    """Hack Text count command. Return integer, or tuple if len(options) > 1.

    Tkinter does not provide a wrapper for the Tk Text widget count command
    at Python 2.7.1

    widget is a Tkinter Text widget.
    index1 and index2 are Indicies as specified in TkCmd documentation.
    options must be a tuple of zero or more option values.  If no options
    are given the Tk default option is used.  If less than two options are
    given an integer is returned.  Otherwise a tuple of integers is returned
    (in the order specified in TkCmd documentation).

    See text manual page in TkCmd documentation for valid option values and
    index specification.

    Example:
    chars, lines = text_count(widget, start, end, '-chars', '-lines')

    """
    return widget.tk.call((widget._w, 'count') + options + (index1, index2))


text = tkinter.Text()

print(text.count("1.0", tkinter.END))                                       # (1,0)
print(text.count("1.0", "1.0"))                                                 # None
print(text_count(text, "1.0", "1.0"))                                        # 0
print(text_count(text, "1.0", tkinter.END))                              # 1
print(text.count("1.0", tkinter.END, "chars"))                         # (1,)
print(text.count("1.0", "1.0", "chars"))                                   # None
print(text_count(text, "1.0", "1.0", "-chars"))                         # 0
print(text_count(text, "1.0", tkinter.END, "-chars"))               # 1
print(text.count(tkinter.END, "1.0", "chars"))                         # (-1,)
print(text_count(text, tkinter.END, "1.0", "-chars"))               # -1
print(text.count("1.0", tkinter.END, "chars", "lines"))             # (1, 1)
print(text.count("1.0", "1.0", "chars", "lines"))                       # (0, 0)
print(text_count(text, "1.0", "1.0", "-chars", "-lines"))            # (0, 0)
print(text_count(text, "1.0", tkinter.END, "-chars", "-lines"))  # (1, 1)

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