Initial impetus was #20958 (ps --format .Label abc). This is
a complicated solution to a simple-seeming problem.
The problem: .Label is a cobra *function*, something I did not
know about nor handle.
Solution: recognize cobra functions. Switch to __complete,
not __completeNoDesc, so we can see the number of arguments
required. Invent new man-page format for documenting functions.
And, finally, start enforcing how functions (and cobra structs)
are documented.
This discovered a never-used completion function, .Recycle(),
in podman-events. Remove it.
[NO NEW TESTS NEEDED] - the .go change is an excision of dead code.
Signed-off-by: Ed Santiago <santiago@redhat.com>
