re.sub() replaces only several matches #56287

assignee = None
closed_at = <Date 2011-05-14.21:49:39.374>
created_at = <Date 2011-05-14.15:04:53.100>
labels = ['expert-regex']
title = 're.sub() replaces only several matches'
updated_at = <Date 2011-05-14.22:13:00.721>
user = 'https://bugs.python.org/arysin'

activity = <Date 2011-05-14.22:13:00.721>
actor = 'arysin'
assignee = 'none'
closed = True
closed_date = <Date 2011-05-14.21:49:39.374>
closer = 'ezio.melotti'
components = ['Regular Expressions']
creation = <Date 2011-05-14.15:04:53.100>
creator = 'arysin'
dependencies = []
files = ['21999', '22000', '22001']
hgrepos = []
issue_num = 12078
keywords = []
message_count = 4.0
messages = ['135975', '135980', '135992', '135995']
nosy_count = 3.0
nosy_names = ['ezio.melotti', 'mrabarnett', 'arysin']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '11957'
type = None
url = 'https://bugs.python.org/issue12078'
versions = ['Python 3.1']