Re: [Git 2.22.0] git submodule foreach now requires quoted command?

> I have a script which I have used for long time, with numerous
> git commands and one of commands is this trivial:
>
> git submodule foreach --recursive git clean -ffd
>
> I updated to Git 2.22.0 and noticed Git started to complain:
>
> ```
> $ cd /d/boost
> $ git submodule foreach --recursive git clean -ffd
> Entering 'libs/accumulators'
> error: unknown switch `f'
> usage: git submodule--helper foreach [--quiet] [--recursive] [--] <command>
>
>     -q, --quiet           Suppress output of entering each submodule command
>     --recursive           Recurse into nested submodules
>
> fatal: run_command returned non-zero status while recursing in the
> nested submodules of libs/accumulators
> ```
>
> Apparently, I have to quote the command to avoid the error
>
> git submodule foreach --recursive 'git clean -ffd'
>
> Is this expected behaviour?
> Could anyone help me to understand what has changed?
> I can't find any related changes in the release notes.