[Issue 1900] Template overload sets & traits templates

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=1900
Issue 1900 depends on issue 10658, which changed state.

Issue 10658 Summary: Cannot merge template overload set by using alias declaration
https://issues.dlang.org/show_bug.cgi?id=10658

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

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