Open pyexpat compilation, Make shows error（missing separator）

BPO	35586
Nosy	@ned-deily, @aaronpaulhurst
PRs	bpo-35184: Fix XML_POOR_ENTROPY option that breaks makesetup parsing of pyexpat line in Setup.dist #12900
Superseder	bpo-35184: Makefile is not correctly generated when compiling pyextat with DXML_POOR_ENTROPY=1

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2019-06-11.04:19:20.688>
created_at = <Date 2018-12-26.03:59:43.327>
labels = ['extension-modules', 'build', '3.7']
title = 'Open pyexpat compilation, Make shows error\xef\xbc\x88missing separator\xef\xbc\x89'
updated_at = <Date 2019-06-11.04:19:20.687>
user = 'https://bugs.python.org/kbengine'

bugs.python.org fields:

activity = <Date 2019-06-11.04:19:20.687>
actor = 'benjamin.peterson'
assignee = 'none'
closed = True
closed_date = <Date 2019-06-11.04:19:20.688>
closer = 'benjamin.peterson'
components = ['Extension Modules']
creation = <Date 2018-12-26.03:59:43.327>
creator = 'kbengine'
dependencies = []
files = []
hgrepos = []
issue_num = 35586
keywords = ['patch']
message_count = 4.0
messages = ['332529', '334804', '340634', '345178']
nosy_count = 3.0
nosy_names = ['ned.deily', 'kbengine', 'ahurst']
pr_nums = ['12900']
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '35184'
type = 'compile error'
url = 'https://bugs.python.org/issue35586'
versions = ['Python 3.7']