Polishing

spring-beans/src/main/java/org/springframework/beans/BeanUtils.java

@@ -403,8 +403,7 @@ public abstract class BeanUtils {
 
 
 	/**
-	 * Retrieve the JavaBeans {@code PropertyDescriptor}s of a given
-	 * class.
+	 * Retrieve the JavaBeans {@code PropertyDescriptor}s of a given class.
 	 * @param clazz the Class to retrieve the PropertyDescriptors for
 	 * @return an array of {@code PropertyDescriptors} for the given class
 	 * @throws BeansException if PropertyDescriptor look fails

spring-beans/src/main/java/org/springframework/beans/factory/support/DisposableBeanAdapter.java

@@ -115,7 +115,7 @@ class DisposableBeanAdapter implements DisposableBean, Runnable, Serializable {
 			this.destroyMethod = determineDestroyMethod(destroyMethodName);
 			if (this.destroyMethod == null) {
 				if (beanDefinition.isEnforceDestroyMethod()) {
-					throw new BeanDefinitionValidationException("Couldn't find a destroy method named '" +
+					throw new BeanDefinitionValidationException("Could not find a destroy method named '" +
 							destroyMethodName + "' on bean with name '" + beanName + "'");
 				}
 			}

spring-context/src/main/java/org/springframework/context/support/GenericApplicationContext.java

@@ -381,8 +381,8 @@ public class GenericApplicationContext extends AbstractApplicationContext implem
 	 * @param beanName the name of the bean (may be {@code null})
 	 * @param beanClass the class of the bean (resolving a public constructor
 	 * to be autowired, possibly simply the default constructor)
-	 * @param customizers one or more callbacks for customizing the
-	 * factory's {@link BeanDefinition}, e.g. setting a lazy-init or primary flag
+	 * @param customizers one or more callbacks for customizing the factory's
+	 * {@link BeanDefinition}, e.g. setting a lazy-init or primary flag
 	 * @since 5.0
 	 * @see #registerBean(String, Class, Supplier, BeanDefinitionCustomizer...)
 	 */

spring-context/src/test/java/org/springframework/context/annotation/AnnotationConfigApplicationContextTests.java

@@ -105,6 +105,24 @@ public class AnnotationConfigApplicationContextTests {
 		}
 	}
 
+	@Test
+	public void getBeanByTypeAmbiguityRaisesException() {
+		ApplicationContext context = new AnnotationConfigApplicationContext(TwoTestBeanConfig.class);
+
+		try {
+			context.getBean(TestBean.class);
+		}
+		catch (NoSuchBeanDefinitionException ex) {
+			assertThat(ex.getMessage(),
+					allOf(
+							containsString("No qualifying bean of type '" + TestBean.class.getName() + "'"),
+							containsString("tb1"),
+							containsString("tb2")
+					)
+			);
+		}
+	}
+
 	/**
 	 * Tests that Configuration classes are registered according to convention
 	 * @see org.springframework.beans.factory.support.DefaultBeanNameGenerator#generateBeanName
@@ -370,14 +388,6 @@ public class AnnotationConfigApplicationContextTests {
 		}
 	}
 
-	static class ConfigMissingAnnotation {
-
-		@Bean
-		public TestBean testBean() {
-			return new TestBean();
-		}
-	}
-
 	@Configuration
 	static class TwoTestBeanConfig {