Add snippet on how to configure a "split" stream for console

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2018-02-11.17:08:39.188>
labels = ['3.8', 'docs']
title = 'Add snippet on how to configure a "split" stream for console'
updated_at = <Date 2018-02-11.17:11:05.504>
user = 'https://github.com/mariocj89'

bugs.python.org fields:

activity = <Date 2018-02-11.17:11:05.504>
actor = 'mariocj89'
assignee = 'docs@python'
closed = False
closed_date = None
closer = None
components = ['Documentation']
creation = <Date 2018-02-11.17:08:39.188>
creator = 'mariocj89'
dependencies = []
files = []
hgrepos = []
issue_num = 32821
keywords = ['patch']
message_count = 1.0
messages = ['312003']
nosy_count = 2.0
nosy_names = ['docs@python', 'mariocj89']
pr_nums = ['5625']
priority = 'normal'
resolution = None
stage = 'patch review'
status = 'open'
superseder = None
type = None
url = 'https://bugs.python.org/issue32821'
versions = ['Python 3.8']