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Author: nik9000

x-pack/plugin/esql/src/main/java/org/elasticsearch/xpack/esql/expression/function/scalar/math/CopySign.java

@@ -62,8 +62,10 @@ EvalOperator.ExpressionEvaluator.Factory create(
     private DataType dataType;
 
     @FunctionInfo(
-        description = "Returns a value with the magnitude of the first argument and the sign of the second argument. "
-            + "This function is similar to Java's Math.copySign(double magnitude, double sign).",
+        description = """
+            Returns a value with the magnitude of the first argument and the sign of the second argument.
+            This function is similar to Java's Math.copySign(double magnitude, double sign) which is
+            similar to `copysign` from [IEEE 754](https://en.wikipedia.org/wiki/IEEE_754).""",
         returnType = { "double", "integer", "long" }
     )
     public CopySign(