Unable to iterate over lines in a file without a block of code

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-01-08.04:09:44.308>
labels = ['type-feature', 'library', '3.11']
title = 'Unable to iterate over lines in a file without a block of code'
updated_at = <Date 2022-01-09.10:57:23.802>
user = 'https://github.com/jaraco'

bugs.python.org fields:

activity = <Date 2022-01-09.10:57:23.802>
actor = 'serhiy.storchaka'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2022-01-08.04:09:44.308>
creator = 'jaraco'
dependencies = []
files = []
hgrepos = []
issue_num = 46304
keywords = []
message_count = 8.0
messages = ['410075', '410078', '410090', '410114', '410115', '410118', '410122', '410137']
nosy_count = 5.0
nosy_names = ['jaraco', 'eric.smith', 'njs', 'serhiy.storchaka', 'Dennis Sweeney']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue46304'
versions = ['Python 3.11']