Added thousands separators to Lib/pstats.py final report

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2019-01-29.12:52:11.441>
labels = ['3.8', 'type-feature', 'library']
title = 'Added thousands separators to Lib/pstats.py final report'
updated_at = <Date 2019-06-01.12:02:14.647>
user = 'https://github.com/addonszz'

bugs.python.org fields:

activity = <Date 2019-06-01.12:02:14.647>
actor = 'cheryl.sabella'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2019-01-29.12:52:11.441>
creator = 'addons_zz'
dependencies = []
files = []
hgrepos = []
issue_num = 35849
keywords = ['patch', 'patch', 'patch']
message_count = 3.0
messages = ['334513', '334522', '344169']
nosy_count = 3.0
nosy_names = ['SilentGhost', 'cheryl.sabella', 'addons_zz']
pr_nums = ['11695', '11695', '11695', '13411']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue35849'
versions = ['Python 3.8']