pathlib.Path: add follow_symlinks argument to stat() and chmod()

[barneygale]

BPO	39906
Nosy	@pitrou, @zooba, @miss-islington, @barneygale
PRs	#18864 #26087 #26089 #26100

^{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 2021-04-07.15:53:57.312>
created_at = <Date 2020-03-08.20:35:19.791>
labels = ['type-feature', 'library', '3.9']
title = 'pathlib.Path: add `follow_symlinks` argument to `stat()` and `chmod()`'
updated_at = <Date 2021-05-13.12:35:11.182>
user = 'https://github.com/barneygale'

bugs.python.org fields:

activity = <Date 2021-05-13.12:35:11.182>
actor = 'miss-islington'
assignee = 'none'
closed = True
closed_date = <Date 2021-04-07.15:53:57.312>
closer = 'steve.dower'
components = ['Library (Lib)']
creation = <Date 2020-03-08.20:35:19.791>
creator = 'barneygale'
dependencies = []
files = []
hgrepos = []
issue_num = 39906
keywords = ['patch']
message_count = 3.0
messages = ['363681', '390439', '393575']
nosy_count = 4.0
nosy_names = ['pitrou', 'steve.dower', 'miss-islington', 'barneygale']
pr_nums = ['18864', '26087', '26089', '26100']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue39906'
versions = ['Python 3.9']

[barneygale]

As of Python 3.3, os.lstat() and os.lchmod() are available as os.stat(follow_symlinks=False) and os.chmod(follow_symlinks=False), but an equivalent change didn't make it into pathlib. I propose we add the follow_symlinks argument to Path.stat() and Path.chmod() for consistency with os and because the new notation is arguable clearer for people who don't know many system calls off by heart :)

[zooba]

New changeset abf9649 by Barney Gale in branch 'master':
bpo-39906: Add follow_symlinks parameter to pathlib.Path.stat() and chmod() (GH-18864)
abf9649

[miss-islington]

New changeset 2d972b8 by Miss Islington (bot) in branch '3.10':
bpo-39906: Document new follow_symlinks argument to pathlib.Path.stat() and chmod() in 3.10 whatsnew. (GH-26089)
2d972b8