Unprintable ASCII character found in Swift Source Code
--Clean Build Folder didn't help. --Restarting Xcode didn't help. --Even if you look at the above Stackoverflow, it didn't work.
――As a result of retyping the angry sentence, Build now passes.
→ ASCII characters may have been created and misrecognized without your knowledge.
I hope it helps people who get "Hmm?" With this error.
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