patch for etree cdata and attr quoting

[chrism]

BPO	1424171
Nosy	@birkenfeld
Files	betterescape.patch

^{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 2006-02-08.17:00:56.000>
created_at = <Date 2006-02-04.18:23:43.000>
labels = ['expert-XML']
title = 'patch for etree cdata and attr quoting'
updated_at = <Date 2006-02-08.17:00:56.000>
user = 'https://bugs.python.org/chrism'

bugs.python.org fields:

activity = <Date 2006-02-08.17:00:56.000>
actor = 'chrism'
assignee = 'effbot'
closed = True
closed_date = None
closer = None
components = ['XML']
creation = <Date 2006-02-04.18:23:43.000>
creator = 'chrism'
dependencies = []
files = ['1890']
hgrepos = []
issue_num = 1424171
keywords = []
message_count = 6.0
messages = ['27438', '27439', '27440', '27441', '27442', '27443']
nosy_count = 3.0
nosy_names = ['effbot', 'georg.brandl', 'chrism']
pr_nums = []
priority = 'normal'
resolution = 'wont fix'
stage = None
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue1424171'
versions = ['Python 2.5']

[chrism]

Attached is a patch for ElementTree (based on a checkout from the SVN
trunk's xmlcore.etree) that seems to perform better escaping of cdata and
attribute values. Instead of replacing, for example "&quote;" with
"&quote;" or "&" with "&", it tries to avoid requoting
ampersands in things that look like entities.

Sorry, I haven't tested this with anything except Python 2.4, I'm not quite
sure what to do about _encode_entity, and I haven't patched any tests or
written a new one for this change. Consider this more of a RFC than a
patch ready-for-submission as a result.

[chrism]

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Sorry, the tracker doesn't seem to want to allow me to upload the file. See
http://www.plope.com/static/misc/betterescape.patch for the patch.

[birkenfeld]

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OP: You did check the box?

[chrism]

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Egads, I did this time.

[effbot]

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I'm not sure I follow. ET works on the infoset side of
things, where everything is decoded into Unicode strings (or
compatible ASCII strings). If you set an attribute to
"&" in the infoset, it *must* be encoded on the way out.
If you want an ampersand, use "&".

[chrism]

Logged In: YES
user_id=32974

Doh, of course. Sorry, I suspect I'll need to go to remedial XML class. Ignore
this.