batchproc, minimal code readability improvements.

src/main/java/uk/ac/ebi/utils/threading/batchproc/BatchCollector.java

@@ -7,12 +7,12 @@
 /**
  * ## The Batch Collector
  * 
- * A batch collector is a container of methods to manage matches during the operations of 
+ * A batch collector is a container of methods to manage batches during the operations of 
  * {@link BatchProcessor}. This default interface offers a {@link #batchFactory() batch factory}, used
  * to obtain a new batch when needed, and a {@link #batchReadyFlag() ready flag}, which establishes if
- * a batch is ready for being processed (eg, it's full wrt o a given size).  
+ * a batch is ready for being processed (eg, it's full wrt a given size).  
  * 
- * Significant specific sub-interface are the {@link SizedBatchCollector sized-based collectors}, the
+ * Significant specific sub-interfaces are the {@link SizedBatchCollector sized-based collectors}, the
  * {@link ItemizedSizedBatchCollector item-based one} and their {@link ItemizedSizedBatchCollector intersection}.  
  *
  * Due to some similarity, batch collectors are named after {@link Collector Java stream collectors}.

src/main/java/uk/ac/ebi/utils/threading/batchproc/collectors/CollectionBatchCollector.java

@@ -45,7 +45,7 @@ public Supplier<C> batchFactory () {
 
 	@Override
 	public BiConsumer<C, E> accumulator () {
-		return (coll,elem) -> coll.add ( elem );
+		return C::add;
 	}
 
 	@Override