[Issue 16504] [REG 2.072a]`dup` can't use storage class `scope` for its parameter in general

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=16504

--- Comment #1 from github-bugzilla at puremagic.com ---
Commits pushed to stable at https://github.com/dlang/druntime

https://github.com/dlang/druntime/commit/ce6aef38adbf7f652db67bc7287a97e45c173b8f
Revert "Merge pull request #1637 from WalterBright/scope-dup"

This reverts commit 35cd63567095bf865e0c7b4bb8bb92945b6244a5, reversing
changes made to aee373fb541dafce2769792b4430be82ef25bd2b.

- fixes Issue 16504 - dup can't use storage class scope for its parameter in
general

https://github.com/dlang/druntime/commit/2f3f7c80d9843f4c2de05fdd2e15af71f185cf62
add unittest example for Issue 16504

- fairly synthetic example, but serves as documentation

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