How come when I use `coroutine.wrap(function() end)` it errors?

Whenever I make a script using coroutine.wrap(function() end) it errors, I know its like coroutine.resume(coroutine.create(function() end)), but when I use it it always errors for some reason, here is an example of what I mean;

coroutine.wrap(function()
print("I'm in a coroutine!")
end)

And when I do something like that, it doesn't work (As shown in the example, it won't print I'm in a coroutine!), is there something that I'm forgetting to add, or am I using it wrong?

The script shouldn't error, it just should't print.

coroutine.wrap returns a function, unlike coroutine.create which returns a thread, that you have to call.

coroutine.wrap(function()
print("I'm in a coroutine!")
end)() -- Call the function