Add missing space in keepanno doc

Change-Id: I6dd89d6a5445cf1bde08514f497db22338c4c420
diff --git a/src/keepanno/java/com/android/tools/r8/keepanno/annotations/UsedByNative.java b/src/keepanno/java/com/android/tools/r8/keepanno/annotations/UsedByNative.java
index 4bf6253..24be0b2 100644
--- a/src/keepanno/java/com/android/tools/r8/keepanno/annotations/UsedByNative.java
+++ b/src/keepanno/java/com/android/tools/r8/keepanno/annotations/UsedByNative.java
@@ -65,7 +65,7 @@
    *   <li>{@link KeepItemKind#ONLY_CLASS} if no member patterns are defined;
    *   <li>{@link KeepItemKind#CLASS_AND_METHODS} if method patterns are defined;
    *   <li>{@link KeepItemKind#CLASS_AND_FIELDS} if field patterns are defined;
-   *   <li>{@link KeepItemKind#CLASS_AND_MEMBERS}otherwise.
+   *   <li>{@link KeepItemKind#CLASS_AND_MEMBERS} otherwise.
    * </ul>
    *
    * <p>When annotating a method the default kind is: {@link KeepItemKind#ONLY_METHODS}