[Issue 21777] std.format: several issues when formatting integers with precision

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21777

--- Comment #2 from Berni44 <bugzilla at bernis-buecher.de> ---
Two more:

assert(format!"%0#.8,2s"(12345) == "00,01,23,45");
assert(format!"%0#.9,3x"(55) == "0x000,000,037");

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