why does isForwardRange work like this?

[via Digitalmars-d-learn]

On Friday, 1 August 2014 at 04:52:35 UTC, Jonathan M Davis wrote:
> On Thursday, 31 July 2014 at 22:21:10 UTC, Vlad Levenfeld wrote:
>> Yes, I see the problem now. I can't think of any reason why 
>> I'd want to make save anything but a function (especially 
>> since `save` is a verb) but I guess someone out there might 
>> have a good one.
>
> It's Andrei's fault. I'm not quite sure what he was thinking. 
> But unfortunately, we're stuck with it. So, it's just become 
> one of D's little quirks that we have to learn and live with.

Can we not at least deprecate it? And while we're at it, the same 
for `dup` and `idup`?