[Issue 23352] `in` and `out` foreach variables

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23352

elpenguino+D at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |elpenguino+D at gmail.com

--- Comment #1 from elpenguino+D at gmail.com ---
What is `out` supposed to be used for here? It seems like it'd be identical to
`ref` in this context.

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