Fix formatting error

Author: kevinthecheung

appcheck/firebase-appcheck/src/main/java/com/google/firebase/appcheck/AppCheckProvider.java

@@ -20,8 +20,8 @@
 /**
  * Interface for a provider that generates {@link AppCheckToken}s. This provider can be called at
  * any time by any Firebase library that depends (optionally or otherwise) on {@link
- * AppCheckToken}s. This provider is responsible for determining if it can create a new token
- * at the time of the call and returning that new token if it can.
+ * AppCheckToken}s. This provider is responsible for determining if it can create a new token at the
+ * time of the call and returning that new token if it can.
  */
 public interface AppCheckProvider {