fix style issue

Author: ankit--sethi

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/security/authc/apikey/CustomTokenAuthenticator.java

@@ -15,8 +15,8 @@
 import org.elasticsearch.xpack.core.security.authc.AuthenticationToken;
 
 /**
- * An extension point to provide a custom token authenticator implementation. For example, a custom API key or a custom OAuth2 token implementation.
- * The implementation is wrapped by a core `Authenticator` class and included in the authenticator chain _before_ the
+ * An extension point to provide a custom token authenticator implementation. For example, a custom API key or a custom OAuth2 token
+ * implementation. The implementation is wrapped by a core `Authenticator` class and included in the authenticator chain _before_ the
  * respective "standard" authenticator(s).
  */
 public interface CustomTokenAuthenticator {