[Issue 16269] add `aa.ensureAllocated` method to associative array to clear and initialize it

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16269

--- Comment #5 from Ketmar Dark <ketmar at ketmar.no-ip.org> ---
oops. forgot to fix the comment. sorry. ;-)

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