add commas

Author: benpious

lib/Demangling/NodePrinter.cpp

@@ -3305,7 +3305,7 @@ std::string Demangle::keypathSourceString(const char *MangledName,
                   if (argChild->getKind() == Node::Kind::Identifier) {
                     subscriptText += std::string(argChild->getText()) + ": " + argumentTypeNames[idx - 1];
                     if (idx != numChildren) {
-                      subscriptText += " ";
+                      subscriptText += ", ";
                     }
                   } else if (argChild->getKind() == Node::Kind::FirstElementMarker ||
                              argChild->getKind() == Node::Kind::VariadicMarker) {

test/Interpreter/keypath.swift

@@ -84,7 +84,7 @@ print(\Controller.secondLabel!.text)
 print(\Controller["abc"])
 // CHECK: \S.a
 print(\S.a)
-// CHECK: {{\\Controller\.subscript\(int: Int str: String _: Int\)|\\Controller\.<computed 0x.* \(Int\)>}}
+// CHECK: {{\\Controller\.subscript\(int: Int, str: String, _: Int\)|\\Controller\.<computed 0x.* \(Int\)>}}
 print(\Controller[int: 0, str: "", 0])
 // CHECK: {{\\Controller\.thirdLabel|\\Controller\.<computed 0x.* \(Optional<MyLabel>\)>}}
 print(\Controller.thirdLabel)