in SampleApp/Sources/FishyActorsDemo/_PrettyDemoLogger.swift [265:269]
mutating func appendInterpolation(_ value: CustomStringConvertible, leftPadTo totalLength: Int) {
let s = "\(value)"
let pad = String(repeating: " ", count: max(totalLength - s.count, 0))
self.appendLiteral("\(pad)\(s)")
}