Is this the hold-up?

Author: johnno1962

Foundation/NSString.swift

@@ -26,8 +26,8 @@ func NSLocalizedString(_ key: String,
                        tableName: String? = nil,
                        bundle: Bundle = Bundle.main,
                        value: String = "",
-                       comment: String?) -> String {
-    return bundle.localizedString(forKey: key, value:value, table:tableName)
+                       comment: String) -> String {
+    return bundle.localizedString(forKey: key, value: value, table: tableName)
 }
 
 #if os(OSX) || os(iOS)

Foundation/URLSession/http/HTTPURLProtocol.swift

@@ -339,7 +339,7 @@ internal extension _HTTPURLProtocol {
                 NSUnderlyingErrorKey: error,
                 NSURLErrorFailingURLErrorKey: $0,
                 NSURLErrorFailingURLStringErrorKey: $0.absoluteString,
-                NSLocalizedDescriptionKey: NSLocalizedString(error.localizedDescription, comment: nil)
+                NSLocalizedDescriptionKey: NSLocalizedString(error.localizedDescription, comment: "N/A")
                 ]
         }
         let urlError = URLError(_nsError: NSError(domain: NSURLErrorDomain, code: error.code, userInfo: userInfo))