Polish gh-1309

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/authentication/OAuth2DeviceVerificationAuthenticationConverter.java

@@ -48,6 +48,7 @@ public final class OAuth2DeviceVerificationAuthenticationConverter implements Au
 	private static final String ERROR_URI = "https://datatracker.ietf.org/doc/html/rfc6749#section-5.2";
 	private static final Authentication ANONYMOUS_AUTHENTICATION = new AnonymousAuthenticationToken(
 			"anonymous", "anonymousUser", AuthorityUtils.createAuthorityList("ROLE_ANONYMOUS"));
+
 	@Override
 	public Authentication convert(HttpServletRequest request) {
 		if (!("GET".equals(request.getMethod()) || "POST".equals(request.getMethod()))) {

oauth2-authorization-server/src/main/java/org/springframework/security/oauth2/server/authorization/web/authentication/OAuth2EndpointUtils.java

@@ -96,6 +96,6 @@ final class OAuth2EndpointUtils {
 	}
 
 	static boolean validateUserCode(String userCode) {
-		return userCode != null && userCode.toUpperCase().replaceAll("[^A-Z\\d]+", "").length() == 8;
+		return (userCode != null && userCode.toUpperCase().replaceAll("[^A-Z\\d]+", "").length() == 8);
 	}
 }