bug#45938: [PATCH] Avoid ANSI escape characters (bug#45938)

[Evgenii Klimov via "Bug reports for GNU Emacs, the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>]

Hi Eli,

Eli Zaretskii <eliz@gnu.org> writes:
[...]
>> diff --git a/lisp/progmodes/python.el b/lisp/progmodes/python.el
>> index a00289d6de9..7193cc19425 100644
>> --- a/lisp/progmodes/python.el
>> +++ b/lisp/progmodes/python.el
>> @@ -4549,6 +4549,9 @@ (defun python-shell-completion-native-setup ()
>>              readline.parse_and_bind('tab: complete')
>>              # Require just one tab to send output.
>>              readline.parse_and_bind('set show-all-if-ambiguous on')
>> +            # Avoid ANSI escape characters in the output
>> +            readline.parse_and_bind('set colored-completion-prefix off')
>> +            readline.parse_and_bind('set colored-stats off')
>>              # Avoid replacing common prefix with ellipsis.
>>              readline.parse_and_bind('set completion-prefix-display-length 0')
>>  
>
> Are these commands available in every version of Python?

These commands are from GNU Readline, not from Python, but anyway:
- colored-stats was first implemented in readline-6.3 [1]
- colored-completion-prefix since readline-7.0 [2]

Just for the reference, completion-prefix-display-length and
show-all-if-ambiguous, that are already used during the setup, exists
since readline-6.0 and readline-6.2 [3], respectively.

Latest version of readline is 8.2.

[1] https://git.savannah.gnu.org/cgit/readline.git/tree/CHANGES?h=master#n675
[2] https://git.savannah.gnu.org/cgit/readline.git/tree/CHANGES?h=master#n508
[3] https://git.savannah.gnu.org/cgit/readline.git/tree/CHANGES?h=master#n718