We could eventually review this "template" of message everywhere, sometimes I think we lack on having a list of "standards" for CLI messages. For example, what is our default to tell users the command:
- succeeded (Success! || success || done || action verb in simple past)
- failed (Error! || error || exited with status n || ZOMG etc) 
- or, in this specific case: "I will start doing something while you wait a moment... [input wait for a moment] done." (with line break, without line break, upper|lowercase, etc.