Extra clause in class grammar documentation

[JoshuaLandau]

BPO	13658
Nosy	@terryjreedy

^{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 2011-12-24.02:02:26.873>
created_at = <Date 2011-12-23.15:31:53.760>
labels = ['docs']
title = 'Extra clause in class grammar documentation'
updated_at = <Date 2011-12-24.02:02:26.859>
user = 'https://bugs.python.org/JoshuaLandau'

bugs.python.org fields:

activity = <Date 2011-12-24.02:02:26.859>
actor = 'python-dev'
assignee = 'docs@python'
closed = True
closed_date = <Date 2011-12-24.02:02:26.873>
closer = 'python-dev'
components = ['Documentation']
creation = <Date 2011-12-23.15:31:53.760>
creator = 'Joshua.Landau'
dependencies = []
files = []
hgrepos = []
issue_num = 13658
keywords = []
message_count = 2.0
messages = ['150169', '150202']
nosy_count = 5.0
nosy_names = ['terry.reedy', 'cvrebert', 'docs@python', 'python-dev', 'Joshua.Landau']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue13658'
versions = ['Python 3.2']

[JoshuaLandau]

Inside the grammar for classes[1], the documentation states that the inheritance list can be of type:
"(" [argument_list [","] | comprehension] ")"

The "comprehension" part seems to be superfluous, especially as it is valid grammar without the clause.

The 2.7 docs state just "[expression list]", so either the addition should be justified or the extra clause removed.

[1] http://docs.python.org/py3k/reference/compound_stmts.html#grammar-token-classdef

Please see http://mail.python.org/pipermail/python-list/2011-December/1284989.html for discussion.

[python-dev]

New changeset b65007ef59c0 by Benjamin Peterson in branch '3.2':
kill superfluous 'comprehension' case (closes bpo-13658)
http://hg.python.org/cpython/rev/b65007ef59c0