Review Mojo's priorities

• I have read the roadmap and priorities and I believe this request falls within the priorities.

What is your request?

I think that the REPL should print the return values of functions automatically, similarly to what the Python interpreter does. Currently, I have to wrap function invocations in a print() to be able to see the result.

What is your motivation for this change?

I was trying the examples provided here inside the REPL, but the following two functions confused me:

def greet(name):
    return "Hello, "   name   "!"

fn greet2(name: String) -> String:
    return "Hello, "   name   "!"

In the first case, invoking the function from the REPL gives no output and in the second case I got a warning. Initially, I wondered if there was anything wrong with my installation, but then I figured out that I needed to wrap the invocation inside a call to print, like this: print(greet("Mario")). Usually, REPLs don't require explicitly calling print() to see a function's output, and I think Mojo's REPL should have the same behavior.

Any other details?

No response