(readline) Autofill the closing parenthesis during auto-completion for functions which accept no arguments at all

[opensource-assist]

BPO	39314
Nosy	@corona10, @remilapeyre, @opensource-assist
PRs	bpo-39314: Closes parenthesis when autocompleting for functions that take no arguments #20562

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2020-06-30.13:48:54.481>
created_at = <Date 2020-01-12.16:31:37.901>
labels = ['interpreter-core', 'type-feature', '3.10']
title = '(readline) Autofill the closing parenthesis during auto-completion for functions which accept no arguments at all'
updated_at = <Date 2020-06-30.13:48:54.481>
user = 'https://github.com/opensource-assist'

bugs.python.org fields:

activity = <Date 2020-06-30.13:48:54.481>
actor = 'corona10'
assignee = 'none'
closed = True
closed_date = <Date 2020-06-30.13:48:54.481>
closer = 'corona10'
components = ['Interpreter Core']
creation = <Date 2020-01-12.16:31:37.901>
creator = 'opensource-assist'
dependencies = []
files = []
hgrepos = []
issue_num = 39314
keywords = ['patch']
message_count = 2.0
messages = ['359855', '372692']
nosy_count = 3.0
nosy_names = ['corona10', 'remi.lapeyre', 'opensource-assist']
pr_nums = ['20562']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'enhancement'
url = 'https://bugs.python.org/issue39314'
versions = ['Python 3.10']

[opensource-assist]

If Python is compiled with the GNU readline headers, it will provide autocompletion for Python functions and etc.

In the Python interpreter environment, if a function is typed partially, Python will fill in the rest if a tab character is typed.

If a function accepts no arguments, Python still doesn't fill in the last closing paraenthesis during autocompletion, in the hope that the user will provide arguments, but in such a case it's pointless.

[corona10]

New changeset bd4a3f2 by Rémi Lapeyre in branch 'master':
bpo-39314: Closes parenthesis when autocompleting for functions that take no arguments (GH-20562)
bd4a3f2