Report actual size from 'os.path.getsize'

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2020-06-23.16:44:46.724>
labels = ['type-feature', 'library', '3.10']
title = "Report actual size from 'os.path.getsize'"
updated_at = <Date 2020-06-26.07:03:47.625>
user = 'https://github.com/stephenfin'

bugs.python.org fields:

activity = <Date 2020-06-26.07:03:47.625>
actor = 'gdr@garethrees.org'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2020-06-23.16:44:46.724>
creator = 'stephenfin'
dependencies = []
files = []
hgrepos = []
issue_num = 41092
keywords = ['patch']
message_count = 2.0
messages = ['372183', '372412']
nosy_count = 2.0
nosy_names = ['gdr@garethrees.org', 'stephenfin']
pr_nums = ['21088']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue41092'
versions = ['Python 3.10']