[Issue 15197] Allow allocator_list to work with allocators that do not support `expand()`

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=15197

--- Comment #4 from github-bugzilla at puremagic.com ---
Commit pushed to stable at https://github.com/D-Programming-Language/phobos

https://github.com/D-Programming-Language/phobos/commit/2408a31a3f08208194b7345aaeee64e7369010fc
Merge pull request #3689 from economicmodeling/allocator-list-without-expand

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