[Issue 24323] x[0 .. 2] cast to Ty[2], x[$-2 .. $] does not?

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24323

--- Comment #1 from Manu <turkeyman at gmail.com> ---
Actually, the number of variable terms is irrelevant; the equation just needs
to be simplified and the variable terms will naturally be cancelled out.

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