Swift: Fix a model.

Author: geoffw0

swift/ql/lib/codeql/swift/frameworks/StandardLibrary/String.qll

@@ -114,7 +114,7 @@ private class StringSummaries extends SummaryModelCsv {
         ";String;true;init(validating:);;;Argument[0];ReturnValue.OptionalSome;taint",
         ";String;true;init(validatingPlatformString:);;;Argument[0];ReturnValue.OptionalSome;taint",
         ";String;true;init(validatingPlatformString:);;;Argument[0].CollectionElement;ReturnValue.OptionalSome;taint",
-        ";String;true;init(unsafeUninitializedCapacity:initializingUTF8With:);;;Argument[1].CollectionElement;ReturnValue;taint",
+        ";String;true;init(unsafeUninitializedCapacity:initializingUTF8With:);;;Argument[1].Parameter[0].CollectionElement;ReturnValue;taint",
         ";String;true;localizedStringWithFormat(_:_:);;;Argument[0];ReturnValue;taint",
         ";String;true;localizedStringWithFormat(_:_:);;;Argument[1].CollectionElement;ReturnValue;taint",
         ";String;true;insert(contentsOf:at:);;;Argument[0];Argument[-1];taint",

swift/ql/test/library-tests/dataflow/taint/libraries/string.swift

@@ -477,7 +477,7 @@ func taintFromUInt8Array() {
       return 256
     }
   )
-  sink(arg: r3) // $ MISSING: tainted=475
+  sink(arg: r3) // $ tainted=475
 
   sink(arg: String(bytes: cleanUInt8Values, encoding: String.Encoding.utf8)!)
   sink(arg: String(bytes: taintedUInt8Values, encoding: String.Encoding.utf8)!) // $ tainted=450