[Issue 21500] public import in mixin template in module a fails when module b imports a.

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21500

noobnoobsai at gmail.com changed:

           What    |Removed                     |Added
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                 CC|                            |noobnoobsai at gmail.com

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