Re: [PATCH 3/5] checkout --to: no auto-detach if the ref is already checked out

>> +	if (advice_checkout_to)
>> +		die(_("%s is already checked out at %s.\n"
>> +		      "Either use --detach or -b together with --to "
>> +		      "or switch branch in the the other checkout."),
>
> "or switch to a different branch in the other checkout". But maybe we
> can be even more helpful, like:
>
> "%s is already checked out at %s.\n"
> "Either checkout the detached head of branch %s using\n"
> "    git checkout --detach --to %s %s\n"
> "or checkout a new branch based off %s using\n"
> "    git checkout --to %s -b %s newbranch %s\n"
> "or switch to a different branch in the other checkout."
>
> if we can figure out the appropriate arguments at this point in the code.