pub(crate) fn usage() -> !Expand description
Refuses an invocation, saying the smallest true thing about it.
The wall of thirty-two commands is the right answer to “what can this do” and the wrong answer to every other question. A reader who mistyped a name needs that name and a candidate; a reader who got a known command’s arguments wrong needs that command’s spec, which the index does not carry. Printing the index at all three was the same as printing nothing: the one line that mattered was buried forty lines from the top, above the prompt, off the screen.