NumberFormatter not respecting decimal numberStyle on macOS

[MaddyThakker]

Description
NumberFormatter not respecting decimal numberStyle.

Steps to reproduce

import UIKit

extension String {
    func toDecimalWithAutoLocale() -> Decimal? {
        let formatter = NumberFormatter()
        formatter.numberStyle = .decimal
        // Explicitly tell the formatter to generate decimal numbers
        formatter.generatesDecimalNumbers = true

        formatter.locale = Locale(identifier: "en_US")
        if let number = formatter.number(from: self) as? NSDecimalNumber {
            return number as Decimal
        }
        
        // If none work, return nil
        return nil
    }
}


if let decimalValue = "9.20".toDecimalWithAutoLocale() {
    print("Decimal value:", decimalValue) // Should print: Decimal value: 9.20
} else {
    print("Could not parse decimal value.")
}

Output = Decimal value: 9.199999999999999

Expected behavior
The output should be "9.20"

Environment

• Swift compiler version info swift-driver version: 1.87.1 Apple Swift version 5.9 (swiftlang-5.9.0.128.108 clang-1500.0.40.1) Target: arm64-apple-macosx14.0
• Xcode version info Xcode 15.0 Build version 15A240d
• Deployment target: Playground