Format ill-formatted comment in DefaultFieldValueJoiner

Change-Id: I96842c87be82b3ef8306a0ff38859279b7aa7311
diff --git a/src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java b/src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java
index 68381bf..294eb8e 100644
--- a/src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java
+++ b/src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java
@@ -89,8 +89,7 @@
           field -> {
             // We only need to include the fields where including the default value would make a
             // difference. Then we can assert below in updateFlowGraphs() that adding the default
-            // value
-            // changes the field state.
+            // value changes the field state.
             // TODO(b/296030319): Implement this for primitive fields.
             ValueState state = fieldStates.get(field);
             if (state.isUnknown()) {