composer --version used to say "Composer version x.y…", but now no longer contains the "version " part for stable releases (but it's still there for dev snapshots):

% composer --version
Composer version 2.2.7 2022-02-25 11:12:27

% composer selfupdate --stable
Upgrading to version 2.3.2 (stable channel).
…
% composer --version          
Composer 2.3.2 2022-03-30 20:45:25

% composer selfupdate --snapshot
Upgrading to version 29513c15da7115874ea247fe281ccd48c768b2f5 (snapshot channel).
…
% composer --version            
Composer version 2.3-dev (2.3-dev+29513c15da7115874ea247fe281ccd48c768b2f5) 2022-03-31 15:26:35

The coloring is also different:

• when "version " is there, "Composer" is printed green and the version number (with dev suffix) is printed yellow;
• when "version " is missing, only the version number is printed green

This may (well... for me, it did) break code that greps out the version number.

The cause lies in

2.8:
https://github.com/symfony/console/blob/cbcf4b5e233af15cd2bbd50dee1ccc9b7927dc12/Application.php#L304-L315

5.4:
https://github.com/symfony/console/blob/900275254f0a1a2afff1ab0e11abd5587a10e1d6/Application.php#L467-L478