Some cleanup changes.

--
MOS_MIGRATED_REVID=87821306
diff --git a/src/main/java/com/google/devtools/build/lib/analysis/CommandHelper.java b/src/main/java/com/google/devtools/build/lib/analysis/CommandHelper.java
index 416d92e..abc9c22 100644
--- a/src/main/java/com/google/devtools/build/lib/analysis/CommandHelper.java
+++ b/src/main/java/com/google/devtools/build/lib/analysis/CommandHelper.java
@@ -122,7 +122,7 @@
         }
       } else {
         // Map all depArtifacts to the respective label using the multimaps.
-        Iterables.addAll(mapGet(tempLabelMap, label), files);
+        mapGet(tempLabelMap, label).addAll(files);
       }
     }