str.decode('rot13') produces Unicode

[kjohnson]

BPO	1465619
Nosy	@malemburg, @doerwalter, @birkenfeld

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/doerwalter'
closed_at = <Date 2006-04-06.11:25:57.000>
created_at = <Date 2006-04-06.10:05:48.000>
labels = ['docs']
title = "str.decode('rot13') produces Unicode"
updated_at = <Date 2006-04-06.11:25:57.000>
user = 'https://bugs.python.org/kjohnson'

bugs.python.org fields:

activity = <Date 2006-04-06.11:25:57.000>
actor = 'georg.brandl'
assignee = 'doerwalter'
closed = True
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2006-04-06.10:05:48.000>
creator = 'kjohnson'
dependencies = []
files = []
hgrepos = []
issue_num = 1465619
keywords = []
message_count = 4.0
messages = ['28121', '28122', '28123', '28124']
nosy_count = 4.0
nosy_names = ['lemburg', 'doerwalter', 'georg.brandl', 'kjohnson']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1465619'
versions = ['Python 2.4']

[kjohnson]

In 3.8.3 Standard Encodings, the table at the bottom
listing special encodings says that the result of
str.decode('rot13') is a byte string. In Python 2.4.3
it is actually a Unicode string so this table entry
should be changed.

In [40]: 'abc'.decode('rot13')
Out[40]: u'nop'

[birkenfeld]

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user_id=849994

Walter: Wouldn't make it sense for rot13 to actually output
byte strings?

[malemburg]

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rot 13 returns Unicode because it uses the charmap codec
which works this way.

I don't see much of a reason to change this.

The documentation will have to be updated, though.

[birkenfeld]

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Okay. Fixed docs in rev. 43701, 43702.