Alex Hoppen 66e416b604 [AST] Don’t print internal function labels if they start with '$' ...

We might infer internal function labels as `$0` from a closure with which a variable is initialised. But we don’t want to print the function signature as `(_ $0: Int) -> Int` because `$0` is not a valid variable name to declare.

So, in the case described above, only print the type.

Fixes rdar://77462547

2021-05-04 12:42:58 +02:00

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