Fix and improve Javadoc in spring-orm

See gh-28796

spring-orm/src/test/java/org/springframework/orm/jpa/ApplicationManagedEntityManagerIntegrationTests.java

@@ -119,7 +119,7 @@ public class ApplicationManagedEntityManagerIntegrationTests extends AbstractEnt
 
 		doInstantiateAndSave(em);
 		setComplete();
-		endTransaction();	// Should rollback
+		endTransaction();	// Should roll back
 		assertThat(countRowsInTable(em, "person")).as("Tx must have committed back").isEqualTo(1);
 
 		// Now clean up the database
@@ -139,7 +139,7 @@ public class ApplicationManagedEntityManagerIntegrationTests extends AbstractEnt
 		EntityManager em = entityManagerFactory.createEntityManager();
 		em.joinTransaction();
 		doInstantiateAndSave(em);
-		endTransaction();	// Should rollback
+		endTransaction();	// Should roll back
 		assertThat(countRowsInTable(em, "person")).as("Tx must have been rolled back").isEqualTo(0);
 	}
 
@@ -150,7 +150,7 @@ public class ApplicationManagedEntityManagerIntegrationTests extends AbstractEnt
 		doInstantiateAndSave(em);
 
 		setComplete();
-		endTransaction();	// Should rollback
+		endTransaction();	// Should roll back
 		assertThat(countRowsInTable(em, "person")).as("Tx must have committed back").isEqualTo(1);
 
 		// Now clean up the database

spring-orm/src/test/java/org/springframework/orm/jpa/ContainerManagedEntityManagerIntegrationTests.java

@@ -139,7 +139,7 @@ public class ContainerManagedEntityManagerIntegrationTests extends AbstractEntit
 
 		doInstantiateAndSave(em);
 		setComplete();
-		endTransaction();	// Should rollback
+		endTransaction();	// Should roll back
 		assertThat(countRowsInTable(em, "person")).as("Tx must have committed back").isEqualTo(1);
 
 		// Now clean up the database
@@ -150,7 +150,7 @@ public class ContainerManagedEntityManagerIntegrationTests extends AbstractEntit
 	public void testRollbackOccurs() {
 		EntityManager em = createContainerManagedEntityManager();
 		doInstantiateAndSave(em);
-		endTransaction();	// Should rollback
+		endTransaction();	// Should roll back
 		assertThat(countRowsInTable(em, "person")).as("Tx must have been rolled back").isEqualTo(0);
 	}
 
@@ -159,7 +159,7 @@ public class ContainerManagedEntityManagerIntegrationTests extends AbstractEntit
 		EntityManager em = createContainerManagedEntityManager();
 		doInstantiateAndSave(em);
 		setComplete();
-		endTransaction();	// Should rollback
+		endTransaction();	// Should roll back
 		assertThat(countRowsInTable(em, "person")).as("Tx must have committed back").isEqualTo(1);
 
 		// Now clean up the database

spring-orm/src/test/java/org/springframework/orm/jpa/domain/Person.java

@@ -31,7 +31,7 @@ import org.springframework.beans.testfixture.beans.TestBean;
 import org.springframework.context.ApplicationContext;
 
 /**
- * Simple JavaBean domain object representing an person.
+ * Simple JavaBean domain object representing a person.
  *
  * @author Rod Johnson
  */