Remove smart quotes in pydoc text

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-04-29.17:53:25.941>
labels = ['3.8', 'type-feature', '3.7', 'docs']
title = 'Remove smart quotes in pydoc text'
updated_at = <Date 2019-05-06.19:14:03.164>
user = 'https://github.com/zooba'

bugs.python.org fields:

activity = <Date 2019-05-06.19:14:03.164>
actor = 'steve.dower'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2019-04-29.17:53:25.941>
creator = 'steve.dower'
dependencies = []
files = []
hgrepos = []
issue_num = 36754
keywords = ['patch']
message_count = 5.0
messages = ['341107', '341109', '341110', '341597', '341611']
nosy_count = 4.0
nosy_names = ['steven.daprano', 'docs@python', 'steve.dower', 'Giant_Robato']
pr_nums = ['13128']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue36754'
versions = ['Python 3.7', 'Python 3.8']