std.algorithm.splitter on a string not always bidirectional

[Imperatorn]

On Friday, 22 January 2021 at 17:29:08 UTC, Steven Schveighoffer 
wrote:
> On 1/22/21 11:57 AM, Jon Degenhardt wrote:
>> [...]
>
> But that is possible with all 3 splitter variants. Why is one 
> allowed to be bidirectional and the others are not?
>
> [...]

+1