## key step: out=$((set -o xtrace;: "$@") 2>&1) # xtrace option shows us quoting for our args

    ## Cleanup $out
    #  only 1 of the next 4 'left trims' is expected to change $out:
    out=${out#+++++ }
      # if $FUNCNAME is eval'd three times there are five "+" chars
    out=${out#++++ }
      # if $FUNCNAME is eval'd twice there are four "+" chars
    out=${out#+++ }
      # if $FUNCNAME is eval'd there are three "+" chars
    out=${out#++ }
      # xtrace prepends the '++ '; ': ' is from our code shown above.
      # We strip these 5 left most chars.

    # Would be nice to support any level of evals, (hence any no.
    # of '+' chars) [...]