Changed to comma.

UnitTests/DimPosTests.cs

@@ -109,7 +109,7 @@ namespace Terminal.Gui {
 			Assert.Equal ("Pos.Factor(0)", pos.ToString ());
 
 			pos = Pos.Percent (0.5F);
-			Assert.Equal ("Pos.Factor(0.005)", pos.ToString ());
+			Assert.Equal ("Pos.Factor(0,005)", pos.ToString ());
 
 			pos = Pos.Percent (100);
 			Assert.Equal ("Pos.Factor(1)", pos.ToString ());