LUCENE-8042: Fix precommit and CHANGES

lucene/CHANGES.txt

@@ -45,8 +45,10 @@ Improvements
 
 API Changes
 
-* LUCENE-8017: Weight now exposes a getCacheHelper() method to help query caches
-  determine whether or not a query can be cached. (Alan Woodward)
+* LUCENE-8017, LUCENE-8042: Weight, DoubleValuesSource and related objects
+  now implement a SegmentCacheable interface, with a single method
+  isCacheable(LeafReaderContext) determining whether or not the object may
+  be cached against a LeafReader. (Alan Woodward, Robert Muir)
 
 * LUCENE-8038: Payload factors for scoring in PayloadScoreQuery are now
   calculated by a PayloadDecoder, instead of delegating to the Similarity.

lucene/suggest/src/java/org/apache/lucene/search/suggest/document/CompletionWeight.java

@@ -132,6 +132,11 @@ public class CompletionWeight extends Weight {
     throw new UnsupportedOperationException();
   }
 
+  /**
+   * This object can be cached
+   * 
+   * @see org.apache.lucene.search.SegmentCacheable#isCacheable(LeafReaderContext)
+   */
   @Override
   public boolean isCacheable(LeafReaderContext ctx) {
     return true;