(command.Pipeline
  children: [
    (C {(tr)} {(-cd)} {(SQ (Token id:Id.Lit_Chars val:'[.\\n0-9]' span_id:47))})
    (C {(sed)} {(SQ (Token id:Id.Lit_Chars val:'/^$/d' span_id:58))})
    (C {(paste)} {(-s)} {(-d) (Id.Lit_Other '+')})
    (C {(bc)})
  ]
  negated: F
)