[Issue 21556] std.container.array: insertAfter is wrong and should be tested

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21556
Issue 21556 depends on issue 21555, which changed state.

Issue 21555 Summary: std.container.array: insertBack is wrong and should be tested for Array!bool
https://issues.dlang.org/show_bug.cgi?id=21555

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

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