Update docs for OrderedDict to reflect that regular dicts are ordered

[rhettinger]

BPO	36059
Nosy	@rhettinger, @methane
PRs	bpo-36059: Update OrderedDict() docs to reflect that regular dicts are now ordered #11966 [3.7] bpo-36059: Update OrderedDict() docs to reflect that regular dicts are now ordered (GH-11966) #11972

^{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/rhettinger'
closed_at = <Date 2019-02-21.08:19:23.239>
created_at = <Date 2019-02-21.00:26:29.666>
labels = ['3.7', '3.8', 'docs']
title = 'Update docs for OrderedDict to reflect that regular dicts are ordered'
updated_at = <Date 2019-02-21.08:19:23.238>
user = 'https://github.com/rhettinger'

bugs.python.org fields:

activity = <Date 2019-02-21.08:19:23.238>
actor = 'rhettinger'
assignee = 'rhettinger'
closed = True
closed_date = <Date 2019-02-21.08:19:23.239>
closer = 'rhettinger'
components = ['Documentation']
creation = <Date 2019-02-21.00:26:29.666>
creator = 'rhettinger'
dependencies = []
files = []
hgrepos = []
issue_num = 36059
keywords = ['patch']
message_count = 3.0
messages = ['336163', '336190', '336191']
nosy_count = 2.0
nosy_names = ['rhettinger', 'methane']
pr_nums = ['11966', '11972']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue36059'
versions = ['Python 3.7', 'Python 3.8']

[rhettinger]

Am working on a PR for this now. The goals are to clarify the distinction between OrderedDict and regular dict, to remove outdated examples that no longer are the best way to solve a problem, and to move, and to add examples where OrderedDict will continue to be relevant.

[rhettinger]

New changeset 49fd6dd by Raymond Hettinger in branch 'master':
bpo-36059: Update OrderedDict() docs to reflect that regular dicts are now ordered (GH-11966)
49fd6dd

[rhettinger]

New changeset 3006059 by Raymond Hettinger (Miss Islington (bot)) in branch '3.7':
bpo-36059: Update OrderedDict() docs to reflect that regular dicts are now ordered (GH-11966) (GH-bpo-11972)
3006059