Path of exported variable not set as source

[Ricky Tigg]

BASH version: 5.2.26(1)-release. OS: Fedora; Desktop edition.

Hello.

Current state: Vim set as default text editor.

$ cat .bashrc | grep '^export EDITOR'
export EDITOR='/usr/bin/vim'
$ typeset -p EDITOR
declare -x EDITOR="/usr/bin/vim"
$ which nano
/usr/bin/nano

Failure: attempt to set a text editor as the default one of the current
session.

To reproduce in terminal

$ export EDITOR='/usr/bin/nano' && source $HOME/.bashrc
$ echo $EDITOR
/usr/bin/vim

Expected: Latest command's output to be "/usr/bin/nano" instaed of
"/usr/bin/vim".

I unexpectedly get the desired behaviour without invoking 'source'.

$ export EDITOR='/usr/bin/nano'
$ echo $EDITOR
/usr/bin/nano

Hopefully, my interpretation of the 'source' command is correct.