fix checkstyle

Author: pabloem

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

@@ -142,15 +142,15 @@ public boolean foldable() {
     @Override
     public EvalOperator.ExpressionEvaluator.Factory toEvaluator(ToEvaluator toEvaluator) {
         var dataType = dataType();
-        if (!FACTORY_PROVIDERS.containsKey(dataType)) {
+        if (FACTORY_PROVIDERS.containsKey(dataType) == false) {
             throw new EsqlIllegalArgumentException("Unsupported data type [{}] for function [{}]", dataType(), NAME);
         }
         var sign = children().get(1);
         var signFactory = toEvaluator.apply(sign);
         var magnitude = children().get(0);
         if (sign.dataType() != dataType) {
             // If the sign is not the same type as the magnitude, we need to convert it.
-            signFactory = Cast.cast(sign.source(), sign.dataType(), dataType, signFactory);
+            signFactory = Cast.cast(source(), sign.dataType(), dataType, signFactory);
         }
         return FACTORY_PROVIDERS.get(dataType).create(source(), toEvaluator.apply(magnitude), signFactory);
     }