♻️ Minor syntax fix in generated code

Author: angularsen

CodeGen/Generators/UnitsNetGen/UnitTestBaseClassGenerator.cs

@@ -143,7 +143,7 @@ public abstract partial class {_quantity.Name}TestsBase : QuantityTestsBase
                 {GetUnitFullName(unit)} => ({unit.PluralName}InOne{_baseUnit.SingularName}, {unit.PluralName}Tolerance),");
             }
 
-            Writer.WL(@"
+            Writer.WL($@"
                 _ => throw new NotSupportedException()
             }};
         }}
@@ -836,7 +836,7 @@ public void NegationOperator_ReturnsQuantity_WithNegatedValue(double value)
         }}");
         }
 
-Writer.WL(@"
+        Writer.WL($@"
     }}
 }}");
             return Writer.ToString();