Remove unnecessary calls to toString()

See gh-29408

spring-websocket/src/main/java/org/springframework/web/socket/messaging/SessionDisconnectEvent.java

@@ -89,7 +89,7 @@ public class SessionDisconnectEvent extends AbstractSubProtocolEvent {
 
 	@Override
 	public String toString() {
-		return "SessionDisconnectEvent[sessionId=" + this.sessionId + ", " + this.status.toString() + "]";
+		return "SessionDisconnectEvent[sessionId=" + this.sessionId + ", " + this.status + "]";
 	}
 
 }

spring-websocket/src/test/java/org/springframework/web/socket/adapter/standard/ConvertingEncoderDecoderSupportTests.java

@@ -244,7 +244,7 @@ public class ConvertingEncoderDecoderSupportTests {
 	private static class MyTypeToStringConverter implements Converter<MyType, String> {
 		@Override
 		public String convert(MyType source) {
-			return "_" + source.toString();
+			return "_" + source;
 		}
 	}
 
@@ -252,7 +252,7 @@ public class ConvertingEncoderDecoderSupportTests {
 	private static class MyTypeToBytesConverter implements Converter<MyType, byte[]> {
 		@Override
 		public byte[] convert(MyType source) {
-			return ("~" + source.toString()).getBytes();
+			return ("~" + source).getBytes();
 		}
 	}
 

spring-websocket/src/test/java/org/springframework/web/socket/sockjs/client/RestTemplateXhrTransportTests.java

@@ -91,7 +91,7 @@ public class RestTemplateXhrTransportTests {
 		for (int i = 0; i < 2048; i++) {
 			sb.append('h');
 		}
-		String body = sb.toString() + "\n" + "o\n" + "a[\"foo\"]\n" + "c[3000,\"Go away!\"]";
+		String body = sb + "\n" + "o\n" + "a[\"foo\"]\n" + "c[3000,\"Go away!\"]";
 		ClientHttpResponse response = response(HttpStatus.OK, body);
 		connect(response);