DynamicCalculator: Updated the VariableList expression to ignore empty values

Author: ritchiecarroll

Source/Libraries/Adapters/DynamicCalculator/DynamicCalculator.cs

@@ -213,7 +213,7 @@ public string VariableList
                     return;
 
                 // Build the collection of variable names with the new value
-                foreach (string token in value.Split(';'))
+                foreach (string token in value.Split([';'], StringSplitOptions.RemoveEmptyEntries))
                     AddVariable(token);
 
                 // Perform alias replacement on tokens that were not explicitly aliased