[bug#57688] [PATCH v7] gnu: Add wiggle.

[(]

I basically meant that arguments should be written like

  #:foo bar

if `bar' takes up only one line, and

  #:foo
  bar

if `bar' takes up multiple lines, since

  #:phases #~(modify-phases %standard-phases
               ...)

wastes a LOT of horizontal space.

    -- (