struni: Bytes support for TextIOWrapper.write()

[tiran]

BPO	1754339
Nosy	@gvanrossum, @tiran
Files	textiowrapper_bytes.patch: patch against py3k-struni branch r56398

^{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 = None
closed_at = <Date 2008-01-06.22:29:45.867>
created_at = <Date 2007-07-15.15:54:34.000>
labels = ['library']
title = 'struni: Bytes support for TextIOWrapper.write() '
updated_at = <Date 2008-01-06.22:29:45.867>
user = 'https://github.com/tiran'

bugs.python.org fields:

activity = <Date 2008-01-06.22:29:45.867>
actor = 'admin'
assignee = 'none'
closed = True
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2007-07-15.15:54:34.000>
creator = 'christian.heimes'
dependencies = []
files = ['8102']
hgrepos = []
issue_num = 1754339
keywords = ['patch']
message_count = 2.0
messages = ['52879', '52880']
nosy_count = 2.0
nosy_names = ['gvanrossum', 'christian.heimes']
pr_nums = []
priority = 'normal'
resolution = 'rejected'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1754339'
versions = ['Python 3.0']

[tiran]

The patch fixes support for bytes in TextIOWrapper.write(). It also fixes some unit test like test_uu, too.

[gvanrossum]

This looks like the wrong approach. Instead, I'm changing uu.py to explcitly turn the bytes returned by b2a_uu() into a string. (The alternative would be to require the output file to be opened in binary mode, which makes less sense IMO.) The change is r56402.