Improve readability

Author: cherylEnkidu

firebase-firestore/src/main/java/com/google/firebase/firestore/local/QueryEngine.java

@@ -120,7 +120,6 @@ public ImmutableSortedMap<DocumentKey, Document> getDocumentsMatchingQuery(
    * Decides whether SDK should create a full matched field index for this query based on query
    * context and query result size.
    */
-  // TODO(csi): Auto experiment data.
   private void createCacheIndexes(Query query, QueryContext context, int resultSize) {
     if (context.getDocumentReadCount() < indexAutoCreationMinCollectionSize) {
       Logger.debug(

firebase-firestore/src/test/java/com/google/firebase/firestore/model/TargetIndexMatcherTest.java

@@ -664,7 +664,7 @@ public void testBuildTargetIndexWithQueriesWithArrayContains() {
   }
 
   @Test
-  public void testBuildTargetIndexWithQueriesWithOrderBy() {
+  public void testBuildTargetIndexWithQueriesWithOrderBys() {
     for (Query query : queriesWithOrderBys) {
       validateBuildTargetIndexCreateFullMatchIndex(query);
     }