AST: Fix whitespace for switch statements under -print-ast.

No test changes because the tests for `-print-ast` don't match whitespace.

Author: tshortli

lib/AST/ASTPrinter.cpp

@@ -5648,9 +5648,10 @@ void PrintAST::visitCaseStmt(CaseStmt *CS) {
                [&] { Printer << ", "; });
   }
   Printer << ":";
-  Printer.printNewline();
 
-  printASTNodes((cast<BraceStmt>(CS->getBody())->getElements()));
+  if (!printASTNodes((cast<BraceStmt>(CS->getBody())->getElements())))
+    Printer.printNewline();
+  indent();
 }
 
 void PrintAST::visitFailStmt(FailStmt *stmt) {

test/refactoring/AddCodableImplementation/Outputs/enum/codable.swift.expected

@@ -25,12 +25,10 @@ enum Payload: Codable {
     }
     switch onlyKey {
     case .plain:
-
       let nestedContainer = try container.nestedContainer(keyedBy: Payload.PlainCodingKeys.self, forKey: Payload.CodingKeys.plain)
 
       self = Payload.plain(try nestedContainer.decode(String.self, forKey: Payload.PlainCodingKeys._0))
-      case .pair:
-
+    case .pair:
       let nestedContainer = try container.nestedContainer(keyedBy: Payload.PairCodingKeys.self, forKey: Payload.CodingKeys.pair)
 
       self = Payload.pair(key: try nestedContainer.decode(String.self, forKey: Payload.PairCodingKeys.key), value: try nestedContainer.decode(String.self, forKey: Payload.PairCodingKeys.value))
@@ -42,12 +40,10 @@ enum Payload: Codable {
 
     switch self {
     case .plain(let a0):
-
       var nestedContainer = container.nestedContainer(keyedBy: Payload.PlainCodingKeys.self, forKey: Payload.CodingKeys.plain)
 
       try nestedContainer.encode(a0, forKey: Payload.PlainCodingKeys._0)
-      case .pair(let key, let value):
-
+    case .pair(let key, let value):
       var nestedContainer = container.nestedContainer(keyedBy: Payload.PairCodingKeys.self, forKey: Payload.CodingKeys.pair)
 
       try nestedContainer.encode(key, forKey: Payload.PairCodingKeys.key)

test/refactoring/AddCodableImplementation/Outputs/enum/decodable.swift.expected

@@ -30,12 +30,10 @@ enum Payload_D: Decodable {
     }
     switch onlyKey {
     case .plain:
-
       let nestedContainer = try container.nestedContainer(keyedBy: Payload_D.PlainCodingKeys.self, forKey: Payload_D.CodingKeys.plain)
 
       self = Payload_D.plain(try nestedContainer.decode(String.self, forKey: Payload_D.PlainCodingKeys._0))
-      case .pair:
-
+    case .pair:
       let nestedContainer = try container.nestedContainer(keyedBy: Payload_D.PairCodingKeys.self, forKey: Payload_D.CodingKeys.pair)
 
       self = Payload_D.pair(key: try nestedContainer.decode(String.self, forKey: Payload_D.PairCodingKeys.key), value: try nestedContainer.decode(String.self, forKey: Payload_D.PairCodingKeys.value))

test/refactoring/AddCodableImplementation/Outputs/enum/encodable.swift.expected

@@ -30,12 +30,10 @@ enum Payload_E: Encodable {
 
     switch self {
     case .plain(let a0):
-
       var nestedContainer = container.nestedContainer(keyedBy: Payload_E.PlainCodingKeys.self, forKey: Payload_E.CodingKeys.plain)
 
       try nestedContainer.encode(a0, forKey: Payload_E.PlainCodingKeys._0)
-      case .pair(let key, let value):
-
+    case .pair(let key, let value):
       var nestedContainer = container.nestedContainer(keyedBy: Payload_E.PairCodingKeys.self, forKey: Payload_E.CodingKeys.pair)
 
       try nestedContainer.encode(key, forKey: Payload_E.PairCodingKeys.key)