pydoc: prefer the pager command in favor of the specifc less command

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2016-06-14.06:27:53.635>
labels = ['type-feature', 'library', '3.11']
title = 'pydoc: prefer the pager command in favor of the specifc less command'
updated_at = <Date 2021-12-09.18:45:23.515>
user = 'https://github.com/doko42'

bugs.python.org fields:

activity = <Date 2021-12-09.18:45:23.515>
actor = 'iritkatriel'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2016-06-14.06:27:53.635>
creator = 'doko'
dependencies = []
files = ['43386']
hgrepos = []
issue_num = 27315
keywords = ['patch']
message_count = 3.0
messages = ['268524', '268538', '268540']
nosy_count = 2.0
nosy_names = ['doko', 'martin.panter']
pr_nums = []
priority = 'low'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue27315'
versions = ['Python 3.11']