Polish "Use text block where feasible"

See gh-31916

spring-messaging/src/test/java/org/springframework/messaging/protobuf/OuterSample.java

@@ -1,3 +1,19 @@
+/*
+ * Copyright 2002-2023 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 // Generated by the protocol buffer compiler.  DO NOT EDIT!
 // source: sample.proto
 
@@ -28,16 +44,10 @@ public class OuterSample {
       descriptor;
   static {
     java.lang.String[] descriptorData = {
-			"""
-
-\014sample.proto",
-\003Msg\022\013
-\003foo\030\001 \001(\t\022\030
-\004blah\030\002 \001(\0132
-.SecondMsg"\031
-\tSecondMsg\022\014
-\004blah\030\001 \001(\005B-
-\034org.springframework.protobufB\013OuterSampleP\001"""
+      "\n\014sample.proto\",\n\003Msg\022\013\n\003foo\030\001 \001(\t\022\030\n\004bl" +
+      "ah\030\002 \001(\0132\n.SecondMsg\"\031\n\tSecondMsg\022\014\n\004bla" +
+      "h\030\001 \001(\005B-\n\034org.springframework.protobufB" +
+      "\013OuterSampleP\001"
     };
     com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
       new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {