[Issue 18528] dmd should deduplicate identical errors

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=18528

--- Comment #4 from Dlang Bot <dlang-bot at dlang.rocks> ---
@WalterBright created dlang/dmd pull request #15306 "fix Issue 18528 - dmd
should deduplicate identical errors" fixing this issue:

- fix Issue 18528 - dmd should deduplicate identical errors

https://github.com/dlang/dmd/pull/15306

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