Fix 'noSuchProperty' test case.

The error message for nonexistent properties inside query derivation now wraps the named property with single quotes. This breaks a test case that was looking for spaces before and after.

Backported to 2.6.x.

See #2418.

src/test/java/org/springframework/data/jpa/repository/query/PartTreeJpaQueryIntegrationTests.java

@@ -222,7 +222,7 @@ public class PartTreeJpaQueryIntegrationTests {
 		assertThatExceptionOfType(IllegalArgumentException.class) //
 				.isThrownBy(() -> new PartTreeJpaQuery(method, entityManager)) //
 				.withMessageContaining("findByNoSuchProperty") // the method being analyzed
-				.withMessageContaining(" noSuchProperty ") // the property we are looking for
+				.withMessageContaining("'noSuchProperty'") // the property we are looking for
 				.withMessageContaining("UserRepository"); // the repository
 	}