[issue6180] Tkinter.Entry: fix for xview and some doc clarifications

[Guilherme Polo]

New submission from Guilherme Polo <ggpolo at gmail.com>:

The xview method in Tkinter.Entry doesn't indicate that index may be
None, which is used to query the Entry xview. I also considered that the
 docstrings in the selection_range and selection_present methods needed
some clarifications, so the attached patch also fixes this.

----------
components: Tkinter
files: Entry_fixes.diff
keywords: patch
messages: 88765
nosy: gpolo
severity: normal
status: open
title: Tkinter.Entry: fix for xview and some doc clarifications
versions: Python 2.7, Python 3.1
Added file: http://bugs.python.org/file14157/Entry_fixes.diff

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<http://bugs.python.org/issue6180>
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