Fix transposed ranges

[Cym13]

On Friday, 30 March 2018 at 20:43:09 UTC, Cym13 wrote:
> Hi, I've got the following code that takes a list of files as 
> argument and xor them together (demo example sufficient for 
> that discussion).
>
> [...]

Forgot to mention but I'm also quite annoyed at the need for that 
".array" because "transposed" requires the RoR to be assignable. 
That kills the laziness. I'm very much open to suggestions 
regarding that point.