[progx]

In this case the variable is the documentation of the code.

You don't have to write something like "this is the message", you can see it.

[amadeuspagel]

What if it isn't a message? What if "msg" is already used for another variable?

[afavour]

This is some wonderful performance art you’re doing here

[Bjartr]

`greetingMsg`? `greeting`? Naming the other one differently? Splitting the work done with that message and the work done with this message into their own functions?

[wruza]

Frankly, this always sounded like a readability issue seeking a readability problem. Splitting because the names clash, because you decided to name things, because a one-liner was less than ideally readable.

[rickstanley]

"_msg", then.