difftool does not support --submodule=diff

[Guillaume Noailhac <guillaume.noailhac@xxxxxxxxx>]

Hello


I would like to see the complete directories diff of my git project 
using the command difftool.

Today the command difftool does not support --submodule=diff.

Is it fixable ?


My current version of git is:

git version 2.34.1

and my difftool is meld;


Best regards

Guillaume Noailhac

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