Re: [PATCH 3/4] builtin/history: replace "--ref-action=print" with "--dry-run"

> The git-history(1) command has the ability to perform a dry-run
> that will not end up modifying any references. Instead, we'll only print
> any ref updates that would happen as a consequence of performing the
> operation.
>
> This mode is somewhat hidden though behind the "--ref-action=print"
> option. This command line option has its origin in git-replay(1), where
> it's probably an okayish interface as this command is sitting more on
> the plumbing side of tools. But git-history(1) is a user-facing tool,
> and this way of achieving a dry-run is way too technical and thus not
> very discoverable.
>
> Besides usability issues, it also has another issue: the dry-run mode
> will always operate as if the user wanted to rewrite all branches. But
> in fact, the user also has the option to only update the HEAD reference,
> and they might want to perform a dry-run of such an operation, too. We
> could of course introduce "--ref-actoin=print-head", but that would
> become even less ergonomic.
>
> Replace "--ref-action=print" with a new "--dry-run" toggle. This new
> toggle works with both "--ref-action={head,branches}" and is way more
> discoverable.
>
> Add a test to verify that both "--ref-action=" values behave as
> expected.