There is no template for that. It's in code - in HandleCommand, there is this line:
OutputTextRaw ("> " + SafeXML(command))
It just prints a greater-than sign (the ">") and then echoes what the user typed. You would need to copy that entire function into your game and then modify it. Changing the ">" is not too hard. If you want to explicitly uppercase/capitalize the verbs, then you would have to somehow parse the command to determine which word(s) the verb is. Of course, if you assume the verb is always the first word, you could just cap the first character of the line...
If you'd like more info/help, it would be helpful to know exactly what you're going for besides "change is the ">"" and "how the verb gets capitalized or not." (I didn't know it was.)