Suggest the usage of Element.iter() instead of iter() in whatsnew

[rahul-kumi]

BPO	39937
Nosy	@tirkarthi, @rahul-kumi
PRs	bpo-39937: modify iter() suggestion to Element.iter() #18937

^{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 2020-03-14.05:51:53.257>
created_at = <Date 2020-03-11.17:51:38.852>
labels = ['type-feature', '3.9', 'docs']
title = 'Suggest the usage of Element.iter() instead of iter() in whatsnew'
updated_at = <Date 2020-03-14.05:51:53.256>
user = 'https://github.com/rahul-kumi'

bugs.python.org fields:

activity = <Date 2020-03-14.05:51:53.256>
actor = 'xtreak'
assignee = 'docs@python'
closed = True
closed_date = <Date 2020-03-14.05:51:53.257>
closer = 'xtreak'
components = ['Documentation']
creation = <Date 2020-03-11.17:51:38.852>
creator = 'rahul-kumi'
dependencies = []
files = []
hgrepos = []
issue_num = 39937
keywords = []
message_count = 2.0
messages = ['363949', '364144']
nosy_count = 3.0
nosy_names = ['docs@python', 'xtreak', 'rahul-kumi']
pr_nums = ['18937']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue39937'
versions = ['Python 3.9']

[rahul-kumi]

In the whatsnew section, under the point which mentions the deprecation of getchildren() and getiterator() through bpo-36543, it is suggested to use iter() instead.

Ideally there should be a suggestion to use Element.iter() instead.

[tirkarthi]

New changeset 7a5cbc7 by Rahul Kumaresan in branch 'master':
bpo-39937: Improve suggestions for removal of getchildren and getiterator in changelog (GH-18937)
7a5cbc7