inspect.getsourceslines() consider lambda of one line only

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-06-21.13:33:42.251>
labels = ['type-bug', '3.9', '3.10', 'extension-modules', 'library', 'OS-windows']
title = 'inspect.getsourceslines() consider lambda of one line only'
updated_at = <Date 2021-06-21.13:33:42.251>
user = 'https://github.com/Welgriv'

bugs.python.org fields:

activity = <Date 2021-06-21.13:33:42.251>
actor = 'Welgriv'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Extension Modules', 'Library (Lib)', 'Windows']
creation = <Date 2021-06-21.13:33:42.251>
creator = 'Welgriv'
dependencies = []
files = []
hgrepos = []
issue_num = 44474
keywords = []
message_count = 1.0
messages = ['396245']
nosy_count = 5.0
nosy_names = ['paul.moore', 'tim.golden', 'zach.ware', 'steve.dower', 'Welgriv']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue44474'
versions = ['Python 3.9', 'Python 3.10']