Re: [PATCH 1/1] clean: further clean-up of implementation around "--force"

> We clarified how clean.requireForce interacts with the --dry-run
> option in the previous commit, both in the implementation and in the
> documentation.  Even when "git clean" (without other options) is
> required to be used with "--force" (i.e. either clean.requireForce
> is unset, or explicitly set to true) to protect end-users from
> casual invocation of the command by mistake, "--dry-run" does not
> require "--force" to be used, because it is already its own
> protection mechanism by being a no-op to the working tree files.
>
> The previous commit, however, missed another clean-up opportunity
> around the same area.  Just like in the "--dry-run" mode, the
> command in the "--interactive" mode does not require "--force",
> either.  This is because by going interactive and giving the end
> user one more step to confirm, the mode itself is serving as its own
> protection mechanism.
>
> Let's take things one step further, unify the code that defines
> interaction between `--force` and these two other options.  Just
> like we added explanation for the reason why "--dry-run" does not
> honor `clean.requireForce`, add the same explanation for
> "--interactive".  Finally, add some tests to show the interaction
> between "--force" and "--interactive" (we already have tests that
> show interaction between "--force" and "--dry-run").