Refactor HTMLParser.unescape to use html.entities.html5

[ezio-melotti]

BPO	15156
Nosy	@ezio-melotti, @merwok, @bitdancer
Files	issue15156.diff issue15156-2.diff

^{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/ezio-melotti'
closed_at = <Date 2012-06-24.20:05:35.901>
created_at = <Date 2012-06-24.02:45:42.758>
labels = ['type-feature', 'library']
title = 'Refactor HTMLParser.unescape to use html.entities.html5'
updated_at = <Date 2012-06-24.20:05:35.899>
user = 'https://github.com/ezio-melotti'

bugs.python.org fields:

activity = <Date 2012-06-24.20:05:35.899>
actor = 'ezio.melotti'
assignee = 'ezio.melotti'
closed = True
closed_date = <Date 2012-06-24.20:05:35.901>
closer = 'ezio.melotti'
components = ['Library (Lib)']
creation = <Date 2012-06-24.02:45:42.758>
creator = 'ezio.melotti'
dependencies = []
files = ['26129', '26131']
hgrepos = []
issue_num = 15156
keywords = ['patch']
message_count = 5.0
messages = ['163702', '163790', '163811', '163837', '163838']
nosy_count = 4.0
nosy_names = ['ezio.melotti', 'eric.araujo', 'r.david.murray', 'python-dev']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue15156'
versions = ['Python 3.3']

[ezio-melotti]

HTMLParser has an internal method called unescape [0] used to convert named character references to the equivalent characters, and it does so by using html.entities.name2codepoint to recreate the equivalent of html.entities.entityrefs with the addition of '.
Now that the html5 entities have been added to html.entities, the parser should use them instead of name2codepoint.

[0]: see Lib/html/parser.py:500

[ezio-melotti]

Here's a patch, please review.

[ezio-melotti]

Patch updated after the review.

[python-dev]

New changeset 0d53703b1a99 by Ezio Melotti in branch 'default':
bpo-15156: HTMLParser now uses the new "html.entities.html5" dictionary.
http://hg.python.org/cpython/rev/0d53703b1a99

[ezio-melotti]

Fixed, thanks for the reviews!