Changing PSI and PS0 leads to four characters at beginning of user input

[lisa-asket]

>From: Greg Wooledge <greg@wooledge.org>
>To: help-bash@gnu.org
>Subject: Re: Changing PSI and PS0 leads to four characters at beginning of 
>user input
>Date: 04/07/2021 21:53:55 Europe/Paris

>On Sun, Jul 04, 2021 at 09:45:18PM +0200, lisa-asket@perso.be wrote:
>> Have now changed the code to include \[ and \]
>> 
>> 
>> 
>>     tfb_normal=$(tput sgr0)
>>     taf_red=$(tput setaf 9)
>>     taf_cyan1=$(tput setaf 51)
>>     taf_gold1=$(tput setaf 220)
>>     PS1='\n\[${taf_cyan1}\]\u@\h:\n'
>>     PS1=$PS1'+ \[${taf_gold1}\]\w\n\[${taf_red}\]'
>>     PS0='\[${tfb_normal}\]'  # use regular foreground color

>You don't want them in PS0. Only in PS1.



Thank you, the two strange characters no longer show up after removing \[ and \]

from PS0.  Strange thing that one sometimes uses \[ and \], and sometimes not.