Polish gh-738

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientCredentialsAuthenticationProvider.java

@@ -88,7 +88,7 @@ public final class OAuth2ClientCredentialsAuthenticationProvider implements Auth
 			throw new OAuth2AuthenticationException(OAuth2ErrorCodes.UNAUTHORIZED_CLIENT);
 		}
 
-		Set<String> authorizedScopes = Collections.EMPTY_SET; // Empty by default
+		Set<String> authorizedScopes = Collections.emptySet();
 		if (!CollectionUtils.isEmpty(clientCredentialsAuthentication.getScopes())) {
 			for (String requestedScope : clientCredentialsAuthentication.getScopes()) {
 				if (!registeredClient.getScopes().contains(requestedScope)) {

oauth2-authorization-server/src/test/java/org/springframework/security/oauth2/server/authorization/authentication/OAuth2ClientCredentialsAuthenticationProviderTests.java

@@ -212,7 +212,7 @@ public class OAuth2ClientCredentialsAuthenticationProviderTests {
 	}
 
 	@Test
-	public void authenticateWhenNoScopeRequestedThenAccessTokenNotContainsAnyScope() {
+	public void authenticateWhenNoScopeRequestedThenAccessTokenDoesNotContainScope() {
 		RegisteredClient registeredClient = TestRegisteredClients.registeredClient2().build();
 		OAuth2ClientAuthenticationToken clientPrincipal = new OAuth2ClientAuthenticationToken(
 				registeredClient, ClientAuthenticationMethod.CLIENT_SECRET_BASIC, registeredClient.getClientSecret());