Use consistent exception messages in Assert calls

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/data/mongo/MongoHealthIndicator.java

@@ -37,7 +37,7 @@ public class MongoHealthIndicator extends AbstractHealthIndicator {
 
 	public MongoHealthIndicator(MongoTemplate mongoTemplate) {
 		super("MongoDB health check failed");
-		Assert.notNull(mongoTemplate, "MongoTemplate must not be null");
+		Assert.notNull(mongoTemplate, "'mongoTemplate' must not be null");
 		this.mongoTemplate = mongoTemplate;
 	}
 

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/jmx/JmxEndpointExporter.java

@@ -95,7 +95,7 @@ private boolean hasOperations(ExposableJmxEndpoint endpoint) {
 	}
 
 	private ObjectName register(ExposableJmxEndpoint endpoint) {
-		Assert.notNull(endpoint, "Endpoint must not be null");
+		Assert.notNull(endpoint, "'endpoint' must not be null");
 		try {
 			ObjectName name = this.objectNameFactory.getObjectName(endpoint);
 			EndpointMBean mbean = new EndpointMBean(this.responseMapper, this.classLoader, endpoint);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/servlet/error/DefaultErrorViewResolver.java

@@ -81,8 +81,8 @@ public class DefaultErrorViewResolver implements ErrorViewResolver, Ordered {
 	 * @since 2.4.0
 	 */
 	public DefaultErrorViewResolver(ApplicationContext applicationContext, Resources resources) {
-		Assert.notNull(applicationContext, "ApplicationContext must not be null");
-		Assert.notNull(resources, "Resources must not be null");
+		Assert.notNull(applicationContext, "'applicationContext' must not be null");
+		Assert.notNull(resources, "'resources' must not be null");
 		this.applicationContext = applicationContext;
 		this.resources = resources;
 		this.templateAvailabilityProviders = new TemplateAvailabilityProviders(applicationContext);

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/quartz/QuartzAutoConfigurationTests.java

@@ -574,7 +574,7 @@ DataSourceScriptDatabaseInitializer customInitializer(DataSource dataSource) {
 	static class ComponentThatUsesScheduler {
 
 		ComponentThatUsesScheduler(Scheduler scheduler) {
-			Assert.notNull(scheduler, "Scheduler must not be null");
+			Assert.notNull(scheduler, "'scheduler' must not be null");
 		}
 
 	}

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/session/SessionAutoConfigurationEarlyInitializationIntegrationTests.java

@@ -57,7 +57,7 @@ static class TestConfiguration {
 
 		@Bean
 		MapSessionRepository mapSessionRepository(ConfigurableApplicationContext context) {
-			Assert.isTrue(context.getBeanFactory().isConfigurationFrozen(), "Context should be frozen");
+			Assert.isTrue(context.getBeanFactory().isConfigurationFrozen(), "'context' should be frozen");
 			return new MapSessionRepository(new LinkedHashMap<>());
 		}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/web/servlet/error/DefaultErrorViewResolverTests.java

@@ -83,14 +83,14 @@ void setup() {
 	@Test
 	void createWhenApplicationContextIsNullShouldThrowException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new DefaultErrorViewResolver(null, new Resources()))
-			.withMessageContaining("ApplicationContext must not be null");
+			.withMessageContaining("'applicationContext' must not be null");
 	}
 
 	@Test
 	void createWhenResourcePropertiesIsNullShouldThrowException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new DefaultErrorViewResolver(mock(ApplicationContext.class), (Resources) null))
-			.withMessageContaining("Resources must not be null");
+			.withMessageContaining("'resources' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-devtools/src/main/java/org/springframework/boot/devtools/remote/server/HttpStatusHandler.java

@@ -47,7 +47,7 @@ public HttpStatusHandler() {
 	 * @param status the status
 	 */
 	public HttpStatusHandler(HttpStatus status) {
-		Assert.notNull(status, "Status must not be null");
+		Assert.notNull(status, "'status' must not be null");
 		this.status = status;
 	}
 

spring-boot-project/spring-boot-devtools/src/test/java/org/springframework/boot/devtools/remote/server/HttpStatusHandlerTests.java

@@ -56,7 +56,7 @@ void setup() {
 	@Test
 	void statusMustNotBeNull() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new HttpStatusHandler(null))
-			.withMessageContaining("Status must not be null");
+			.withMessageContaining("'status' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/mock/mockito/SpringBootMockResolver.java

@@ -44,7 +44,7 @@ public Object resolve(Object instance) {
 
 	@SuppressWarnings("unchecked")
 	private static <T> T getUltimateTargetObject(Object candidate) {
-		Assert.notNull(candidate, "Candidate must not be null");
+		Assert.notNull(candidate, "'candidate' must not be null");
 		try {
 			if (AopUtils.isAopProxy(candidate) && candidate instanceof Advised advised) {
 				TargetSource targetSource = advised.getTargetSource();

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/build/BuildpackCoordinates.java

@@ -42,7 +42,7 @@ final class BuildpackCoordinates {
 	private final String version;
 
 	private BuildpackCoordinates(String id, String version) {
-		Assert.hasText(id, "ID must not be empty");
+		Assert.hasText(id, "'id' must not be empty");
 		this.id = id;
 		this.version = version;
 	}
@@ -123,7 +123,7 @@ private static BuildpackCoordinates fromToml(TomlParseResult toml, Path path) {
 	 * @return a new {@link BuildpackCoordinates} instance
 	 */
 	static BuildpackCoordinates fromBuildpackMetadata(BuildpackMetadata buildpackMetadata) {
-		Assert.notNull(buildpackMetadata, "BuildpackMetadata must not be null");
+		Assert.notNull(buildpackMetadata, "'buildpackMetadata' must not be null");
 		return new BuildpackCoordinates(buildpackMetadata.getId(), buildpackMetadata.getVersion());
 	}
 

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/main/java/org/springframework/boot/buildpack/platform/docker/configuration/DockerConfiguration.java

@@ -81,7 +81,7 @@ public DockerConfiguration withBindHostToBuilder(boolean bindHostToBuilder) {
 	}
 
 	public DockerConfiguration withBuilderRegistryTokenAuthentication(String token) {
-		Assert.notNull(token, "Token must not be null");
+		Assert.notNull(token, "'token' must not be null");
 		return new DockerConfiguration(this.host, new DockerRegistryTokenAuthentication(token),
 				this.publishAuthentication, this.bindHostToBuilder);
 	}

spring-boot-project/spring-boot-tools/spring-boot-buildpack-platform/src/test/java/org/springframework/boot/buildpack/platform/build/BuildpackCoordinatesTests.java

@@ -99,7 +99,7 @@ void fromTomlWhenContainsBothStacksAndOrderThrowsException() throws IOException
 	@Test
 	void fromBuildpackMetadataWhenMetadataIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> BuildpackCoordinates.fromBuildpackMetadata(null))
-			.withMessage("BuildpackMetadata must not be null");
+			.withMessage("'buildpackMetadata' must not be null");
 	}
 
 	@Test
@@ -113,7 +113,7 @@ void fromBuildpackMetadataReturnsCoordinates() throws Exception {
 	@Test
 	void ofWhenIdIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> BuildpackCoordinates.of(null, null))
-			.withMessage("ID must not be empty");
+			.withMessage("'id' must not be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Layer.java

@@ -40,7 +40,7 @@ public class Layer {
 	 * @param name the name of the layer.
 	 */
 	public Layer(String name) {
-		Assert.hasText(name, "Name must not be empty");
+		Assert.hasText(name, "'name' must not be empty");
 		Assert.isTrue(PATTERN.matcher(name).matches(), () -> "Malformed layer name '" + name + "'");
 		Assert.isTrue(!name.equalsIgnoreCase("ext") && !name.toLowerCase(Locale.ROOT).startsWith("springboot"),
 				() -> "Layer name '" + name + "' is reserved");

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/Packager.java

@@ -107,9 +107,9 @@ public abstract class Packager {
 	 * @param source the source archive file to package
 	 */
 	protected Packager(File source) {
-		Assert.notNull(source, "Source file must not be null");
+		Assert.notNull(source, "'source' file must not be null");
 		Assert.isTrue(source.exists() && source.isFile(),
-				() -> "Source must refer to an existing file, got " + source.getAbsolutePath());
+				() -> "'source' must refer to an existing file, got " + source.getAbsolutePath());
 		this.source = source.getAbsoluteFile();
 	}
 
@@ -163,7 +163,7 @@ public void setLayoutFactory(LayoutFactory layoutFactory) {
 	 * @param layers the jar layers
 	 */
 	public void setLayers(Layers layers) {
-		Assert.notNull(layers, "Layers must not be null");
+		Assert.notNull(layers, "'layers' must not be null");
 		this.layers = layers;
 		this.layersIndex = new LayersIndex(layers);
 	}
@@ -204,7 +204,7 @@ protected final void write(JarFile sourceJar, Libraries libraries, AbstractJarWr
 
 	protected final void write(JarFile sourceJar, Libraries libraries, AbstractJarWriter writer,
 			boolean ensureReproducibleBuild) throws IOException {
-		Assert.notNull(libraries, "Libraries must not be null");
+		Assert.notNull(libraries, "'libraries' must not be null");
 		write(sourceJar, writer, new PackagedLibraries(libraries, ensureReproducibleBuild));
 	}
 

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/layer/ApplicationContentFilter.java

@@ -34,7 +34,7 @@ public class ApplicationContentFilter implements ContentFilter<String> {
 	private final String pattern;
 
 	public ApplicationContentFilter(String pattern) {
-		Assert.hasText(pattern, "Pattern must not be empty");
+		Assert.hasText(pattern, "'pattern' must not be empty");
 		this.pattern = pattern;
 	}
 

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/layer/CustomLayers.java

@@ -44,10 +44,10 @@ public class CustomLayers implements Layers {
 
 	public CustomLayers(List<Layer> layers, List<ContentSelector<String>> applicationSelectors,
 			List<ContentSelector<Library>> librarySelectors) {
-		Assert.notNull(layers, "Layers must not be null");
-		Assert.notNull(applicationSelectors, "ApplicationSelectors must not be null");
+		Assert.notNull(layers, "'layers' must not be null");
+		Assert.notNull(applicationSelectors, "'applicationSelectors' must not be null");
 		validateSelectorLayers(applicationSelectors, layers);
-		Assert.notNull(librarySelectors, "LibrarySelectors must not be null");
+		Assert.notNull(librarySelectors, "'librarySelectors' must not be null");
 		validateSelectorLayers(librarySelectors, layers);
 		this.layers = new ArrayList<>(layers);
 		this.applicationSelectors = new ArrayList<>(applicationSelectors);

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/layer/IncludeExcludeContentSelector.java

@@ -47,8 +47,8 @@ public IncludeExcludeContentSelector(Layer layer, List<ContentFilter<T>> include
 
 	public <S> IncludeExcludeContentSelector(Layer layer, List<S> includes, List<S> excludes,
 			Function<S, ContentFilter<T>> filterFactory) {
-		Assert.notNull(layer, "Layer must not be null");
-		Assert.notNull(filterFactory, "FilterFactory must not be null");
+		Assert.notNull(layer, "'layer' must not be null");
+		Assert.notNull(filterFactory, "'filterFactory' must not be null");
 		this.layer = layer;
 		this.includes = (includes != null) ? adapt(includes, filterFactory) : Collections.emptyList();
 		this.excludes = (excludes != null) ? adapt(excludes, filterFactory) : Collections.emptyList();

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/main/java/org/springframework/boot/loader/tools/layer/LibraryContentFilter.java

@@ -36,7 +36,7 @@ public class LibraryContentFilter implements ContentFilter<Library> {
 	private final Pattern pattern;
 
 	public LibraryContentFilter(String coordinatesPattern) {
-		Assert.hasText(coordinatesPattern, "CoordinatesPattern must not be empty");
+		Assert.hasText(coordinatesPattern, "'coordinatesPattern' must not be empty");
 		StringBuilder regex = new StringBuilder();
 		for (int i = 0; i < coordinatesPattern.length(); i++) {
 			char c = coordinatesPattern.charAt(i);

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/AbstractPackagerTests.java

@@ -182,7 +182,7 @@ void nullLibraries() throws Exception {
 		this.testJarFile.addClass("a/b/C.class", ClassWithMainMethod.class);
 		P packager = createPackager();
 		assertThatIllegalArgumentException().isThrownBy(() -> execute(packager, null))
-			.withMessageContaining("Libraries must not be null");
+			.withMessageContaining("'libraries' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/LayerTests.java

@@ -31,12 +31,12 @@ class LayerTests {
 
 	@Test
 	void createWhenNameIsNullThrowsException() {
-		assertThatIllegalArgumentException().isThrownBy(() -> new Layer(null)).withMessage("Name must not be empty");
+		assertThatIllegalArgumentException().isThrownBy(() -> new Layer(null)).withMessage("'name' must not be empty");
 	}
 
 	@Test
 	void createWhenNameIsEmptyThrowsException() {
-		assertThatIllegalArgumentException().isThrownBy(() -> new Layer("")).withMessage("Name must not be empty");
+		assertThatIllegalArgumentException().isThrownBy(() -> new Layer("")).withMessage("'name' must not be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/layer/ApplicationContentFilterTests.java

@@ -33,13 +33,13 @@ class ApplicationContentFilterTests {
 	@Test
 	void createWhenPatternIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new ApplicationContentFilter(null))
-			.withMessage("Pattern must not be empty");
+			.withMessage("'pattern' must not be empty");
 	}
 
 	@Test
 	void createWhenPatternIsEmptyThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new ApplicationContentFilter(""))
-			.withMessage("Pattern must not be empty");
+			.withMessage("'pattern' must not be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/layer/IncludeExcludeContentSelectorTests.java

@@ -42,14 +42,14 @@ void createWhenLayerIsNullThrowsException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(
 					() -> new IncludeExcludeContentSelector<>(null, Collections.emptyList(), Collections.emptyList()))
-			.withMessage("Layer must not be null");
+			.withMessage("'layer' must not be null");
 	}
 
 	@Test
 	void createWhenFactoryIsNullThrowsException() {
 		assertThatIllegalArgumentException()
 			.isThrownBy(() -> new IncludeExcludeContentSelector<>(LAYER, null, null, null))
-			.withMessage("FilterFactory must not be null");
+			.withMessage("'filterFactory' must not be null");
 	}
 
 	@Test

spring-boot-project/spring-boot-tools/spring-boot-loader-tools/src/test/java/org/springframework/boot/loader/tools/layer/LibraryContentFilterTests.java

@@ -38,13 +38,13 @@ class LibraryContentFilterTests {
 	@Test
 	void createWhenCoordinatesPatternIsNullThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new LibraryContentFilter(null))
-			.withMessage("CoordinatesPattern must not be empty");
+			.withMessage("'coordinatesPattern' must not be empty");
 	}
 
 	@Test
 	void createWhenCoordinatesPatternIsEmptyThrowsException() {
 		assertThatIllegalArgumentException().isThrownBy(() -> new LibraryContentFilter(""))
-			.withMessage("CoordinatesPattern must not be empty");
+			.withMessage("'coordinatesPattern' must not be empty");
 	}
 
 	@Test

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/BootstrapRegistry.java

@@ -121,7 +121,7 @@ default Scope getScope() {
 		 * @since 2.4.2
 		 */
 		default InstanceSupplier<T> withScope(Scope scope) {
-			Assert.notNull(scope, "Scope must not be null");
+			Assert.notNull(scope, "'scope' must not be null");
 			InstanceSupplier<T> parent = this;
 			return new InstanceSupplier<>() {
 

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/source/ConfigurationPropertyName.java

@@ -273,7 +273,7 @@ public ConfigurationPropertyName subName(int offset) {
 	 * @return {@code true} if this name is an ancestor
 	 */
 	public boolean isParentOf(ConfigurationPropertyName name) {
-		Assert.notNull(name, "Name must not be null");
+		Assert.notNull(name, "'name' must not be null");
 		if (getNumberOfElements() != name.getNumberOfElements() - 1) {
 			return false;
 		}
@@ -287,7 +287,7 @@ public boolean isParentOf(ConfigurationPropertyName name) {
 	 * @return {@code true} if this name is an ancestor
 	 */
 	public boolean isAncestorOf(ConfigurationPropertyName name) {
-		Assert.notNull(name, "Name must not be null");
+		Assert.notNull(name, "'name' must not be null");
 		if (getNumberOfElements() >= name.getNumberOfElements()) {
 			return false;
 		}
@@ -612,7 +612,7 @@ private static Elements elementsOf(CharSequence name, boolean returnNullIfInvali
 
 	private static Elements elementsOf(CharSequence name, boolean returnNullIfInvalid, int parserCapacity) {
 		if (name == null) {
-			Assert.isTrue(returnNullIfInvalid, "Name must not be null");
+			Assert.isTrue(returnNullIfInvalid, "'name' must not be null");
 			return null;
 		}
 		if (name.isEmpty()) {

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/log4j2/GraylogExtendedLogFormatStructuredLogFormatter.java

@@ -141,7 +141,7 @@ private static void createAdditionalFields(ReadOnlyStringMap contextData, BiCons
 	}
 
 	private static void createAdditionalField(String name, Object value, BiConsumer<Object, Object> pairs) {
-		Assert.notNull(name, "fieldName must not be null");
+		Assert.notNull(name, "'name' must not be null");
 		if (!FIELD_NAME_VALID_PATTERN.matcher(name).matches()) {
 			logger.warn(LogMessage.format("'%s' is not a valid field name according to GELF standard", name));
 			return;

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/logging/logback/GraylogExtendedLogFormatStructuredLogFormatter.java

@@ -133,7 +133,7 @@ private static void createAdditionalField(List<KeyValuePair> keyValuePairs, BiCo
 	}
 
 	private static void createAdditionalField(String name, Object value, BiConsumer<Object, Object> pairs) {
-		Assert.notNull(name, "fieldName must not be null");
+		Assert.notNull(name, "'name' must not be null");
 		if (!FIELD_NAME_VALID_PATTERN.matcher(name).matches()) {
 			logger.warn(LogMessage.format("'%s' is not a valid field name according to GELF standard", name));
 			return;

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/ssl/SslManagerBundle.java

@@ -132,7 +132,7 @@ static SslManagerBundle from(SslStoreBundle storeBundle, SslBundleKey key) {
 	 * @since 3.5.0
 	 */
 	static SslManagerBundle from(TrustManagerFactory trustManagerFactory) {
-		Assert.notNull(trustManagerFactory, "TrustManagerFactory must not be null");
+		Assert.notNull(trustManagerFactory, "'trustManagerFactory' must not be null");
 		KeyManagerFactory defaultKeyManagerFactory = createDefaultKeyManagerFactory();
 		return of(defaultKeyManagerFactory, trustManagerFactory);
 	}
@@ -145,7 +145,7 @@ static SslManagerBundle from(TrustManagerFactory trustManagerFactory) {
 	 * @since 3.5.0
 	 */
 	static SslManagerBundle from(TrustManager... trustManagers) {
-		Assert.notNull(trustManagers, "TrustManagers must not be null");
+		Assert.notNull(trustManagers, "'trustManagers' must not be null");
 		KeyManagerFactory defaultKeyManagerFactory = createDefaultKeyManagerFactory();
 		TrustManagerFactory defaultTrustManagerFactory = createDefaultTrustManagerFactory();
 		return of(defaultKeyManagerFactory, FixedTrustManagerFactory.of(defaultTrustManagerFactory, trustManagers));

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/task/SimpleAsyncTaskSchedulerBuilder.java

@@ -131,7 +131,7 @@ public SimpleAsyncTaskSchedulerBuilder taskDecorator(TaskDecorator taskDecorator
 	 * @see #additionalCustomizers(SimpleAsyncTaskSchedulerCustomizer...)
 	 */
 	public SimpleAsyncTaskSchedulerBuilder customizers(SimpleAsyncTaskSchedulerCustomizer... customizers) {
-		Assert.notNull(customizers, "Customizers must not be null");
+		Assert.notNull(customizers, "'customizers' must not be null");
 		return customizers(Arrays.asList(customizers));
 	}
 
@@ -146,7 +146,7 @@ public SimpleAsyncTaskSchedulerBuilder customizers(SimpleAsyncTaskSchedulerCusto
 	 */
 	public SimpleAsyncTaskSchedulerBuilder customizers(
 			Iterable<? extends SimpleAsyncTaskSchedulerCustomizer> customizers) {
-		Assert.notNull(customizers, "Customizers must not be null");
+		Assert.notNull(customizers, "'customizers' must not be null");
 		return new SimpleAsyncTaskSchedulerBuilder(this.threadNamePrefix, this.concurrencyLimit, this.virtualThreads,
 				this.taskTerminationTimeout, this.taskDecorator, append(null, customizers));
 	}
@@ -160,7 +160,7 @@ public SimpleAsyncTaskSchedulerBuilder customizers(
 	 * @see #customizers(SimpleAsyncTaskSchedulerCustomizer...)
 	 */
 	public SimpleAsyncTaskSchedulerBuilder additionalCustomizers(SimpleAsyncTaskSchedulerCustomizer... customizers) {
-		Assert.notNull(customizers, "Customizers must not be null");
+		Assert.notNull(customizers, "'customizers' must not be null");
 		return additionalCustomizers(Arrays.asList(customizers));
 	}
 
@@ -174,7 +174,7 @@ public SimpleAsyncTaskSchedulerBuilder additionalCustomizers(SimpleAsyncTaskSche
 	 */
 	public SimpleAsyncTaskSchedulerBuilder additionalCustomizers(
 			Iterable<? extends SimpleAsyncTaskSchedulerCustomizer> customizers) {
-		Assert.notNull(customizers, "Customizers must not be null");
+		Assert.notNull(customizers, "'customizers' must not be null");
 		return new SimpleAsyncTaskSchedulerBuilder(this.threadNamePrefix, this.concurrencyLimit, this.virtualThreads,
 				this.taskTerminationTimeout, this.taskDecorator, append(this.customizers, customizers));
 	}