A custom function evaluates the return value

[#1]

fyi

While debugging @replace Head, I noticed that a custom function evaluates the return values +1x compared to a standard function:

myFunction = function({}, return(Expr(3*5)));
add custom functions (newcustom function("my custom", "function", function({}, return(Expr(3*5)))));

Show(myfunction());
Show(my custom:function())

so maybe add another Expr() ...

add custom functions (newcustom function("my custom", "function", function({}, return(Expr(Expr(3*5))))));

Show(my custom:function())