[docs] [issue18688] Document undocumented Unicode object API

[Serhiy Storchaka]

New submission from Serhiy Storchaka:

Include/unicodeobject.h contains followed names which are declared as public but are not documented in Doc/c-api/unicode.rst.

PyUnicodeIter_Type
Py_UNICODE_REPLACEMENT_CHARACTER
PyUnicode_Resize
PyUnicode_InternImmortal
PyUnicode_CHECK_INTERNED
PyUnicode_FromOrdinal
PyUnicode_GetDefaultEncoding
PyUnicode_AsDecodedObject
PyUnicode_AsDecodedUnicode
PyUnicode_AsEncodedObject
PyUnicode_AsEncodedUnicode
PyUnicode_BuildEncodingMap
PyUnicode_DecodeCodePageStateful
PyUnicode_Append
PyUnicode_AppendAndDel
PyUnicode_Partition
PyUnicode_RPartition
PyUnicode_RSplit
PyUnicode_IsIdentifier
_PyUnicode_FromId
_PyUnicode_ClearStaticStrings

They should be either documented or declared as private.

PyUnicode_AsEncodedObject only mentioned in Doc/whatsnew/3.3.rst as recomended replacement of PyUnicode_Encode.

----------
assignee: docs at python
components: Documentation, Unicode
messages: 194705
nosy: docs at python, ezio.melotti, serhiy.storchaka
priority: normal
severity: normal
stage: needs patch
status: open
title: Document undocumented Unicode object API
type: behavior
versions: Python 3.3, Python 3.4

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue18688>
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