Minor change - more direct hint re: multiple machine sizes and LONG_BIT conflicts

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2016-09-29.10:12:38.158>
labels = ['type-feature']
title = 'Minor change - more direct hint re: multiple machine sizes and LONG_BIT conflicts'
updated_at = <Date 2020-02-02.12:59:02.654>
user = 'https://github.com/aixtools'

bugs.python.org fields:

activity = <Date 2020-02-02.12:59:02.654>
actor = 'Michael.Felt'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = []
creation = <Date 2016-09-29.10:12:38.158>
creator = 'Michael.Felt'
dependencies = []
files = []
hgrepos = []
issue_num = 28312
keywords = ['patch']
message_count = 1.0
messages = ['277695']
nosy_count = 1.0
nosy_names = ['Michael.Felt']
pr_nums = ['18313']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue28312'
versions = []