DOCSP-30115 bitAnd Empty Array Behavior (#3334)

Author: ajhuh-mdb

source/reference/operator/aggregation/bitAnd.txt

@@ -38,6 +38,8 @@ Behavior
 
 .. include:: /includes/fact-bitwise-type-error.rst
 
+If the argument is an empty array, the operation returns ``NumberInt(-1)``.
+
 If any of the operands equate to ``null``, the operation returns ``null``. 
 
 Examples