Remove unnecessary toString() call.

There were few explicit `toString()` calls that are not needed, since `toString()` will be called by default.

Original pull request spring-projects#2431

Author: DiegoKrupitza

src/main/java/org/springframework/data/jpa/convert/QueryByExamplePredicateBuilder.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2021 the original author or authors.
+ * Copyright 2016-2022 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.
@@ -278,7 +278,7 @@ public String toString() {
 
 			StringBuilder sb = new StringBuilder();
 			if (parent != null) {
-				sb.append(parent.toString());
+				sb.append(parent);
 				sb.append(" -");
 				sb.append(name);
 				sb.append("-> ");

src/main/java/org/springframework/data/jpa/repository/query/StringQuery.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2021 the original author or authors.
+ * Copyright 2013-2022 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.
@@ -752,11 +752,11 @@ public Object prepare(@Nullable Object value) {
 
 			switch (type) {
 				case STARTING_WITH:
-					return String.format("%s%%", value.toString());
+					return String.format("%s%%", value);
 				case ENDING_WITH:
-					return String.format("%%%s", value.toString());
+					return String.format("%%%s", value);
 				case CONTAINING:
-					return String.format("%%%s%%", value.toString());
+					return String.format("%%%s%%", value);
 				case LIKE:
 				default:
 					return value;

src/main/java/org/springframework/data/jpa/support/ClasspathScanningPersistenceUnitPostProcessor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2011-2021 the original author or authors.
+ * Copyright 2011-2022 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.
@@ -191,7 +191,7 @@ private Set<String> scanForMappingFileLocations() {
 				mappingFileUris.add(resourcePathInClasspath);
 
 			} catch (IOException e) {
-				throw new IllegalStateException(String.format("Couldn't get URI for %s!", resource.toString()), e);
+				throw new IllegalStateException(String.format("Couldn't get URI for %s!", resource), e);
 			}
 		}