Recommend importlib.abc.Traversable users to implement __fspath__

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-05-21.00:09:16.984>
labels = ['3.10', 'docs']
title = 'Recommend importlib.abc.Traversable users to implement __fspath__'
updated_at = <Date 2021-05-23.20:12:51.059>
user = 'https://github.com/FFY00'

bugs.python.org fields:

activity = <Date 2021-05-23.20:12:51.059>
actor = 'FFY00'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2021-05-21.00:09:16.984>
creator = 'FFY00'
dependencies = []
files = []
hgrepos = []
issue_num = 44200
keywords = []
message_count = 6.0
messages = ['394083', '394084', '394211', '394213', '394219', '394223']
nosy_count = 4.0
nosy_names = ['brett.cannon', 'jaraco', 'docs@python', 'FFY00']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue44200'
versions = ['Python 3.10']