[Issue 23094] std.range.generate calls fun more than necessary

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23094

--- Comment #1 from Remi Thebault <remi.thebault at outlook.com> ---
DMD64 D Compiler v2.099.1 (Linux x86_64)

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