Tenonauger_state = {}

  Tenonauger_state = edit.initialize_state(Margin_top, Margin_right, App.screen.width-Margin_right, Editor_state.font_height, Editor_state.line_height)
  Tenonauger_state.filename = arg[1]
  load_from_disk(Tenonauger_state)  -- TODO: pay no attention to Fold
  tenonauger.parse(Tenonauger_state)
  Text.redraw_all(Tenonauger_state)
  Tenonauger_state.screen_top1 = {line=1, pos=1}
  Tenonauger_state.cursor1 = {line=1, pos=1}

function tenonauger.parse(State)
  for _,line in ipairs(State.lines) do
    line.filename, line.line_number, line.data = line.data:match('([^:]*):([^:]*):%s*(.*)')
  end
end

  App.color(Text_color)
  assert(#State.lines == #State.line_cache)
  local y = State.top
  for line_index = State.screen_top1.line,#State.lines do
    local line = State.lines[line_index]
    if y + State.line_height > App.screen.height then break end
    State.screen_bottom1 = {line=line_index, pos=nil, posB=nil}
    local startpos, startposB = 1, nil
    if line_index == State.screen_top1.line then
      if State.screen_top1.pos then
        startpos = State.screen_top1.pos
      else
        startpos, startposB = nil, State.screen_top1.posB
      end
    end
    y, State.screen_bottom1.pos, State.screen_bottom1.posB = Text.draw(State, line_index, y, startpos, startposB)
    y = y + State.line_height
  end

-- TODO: some initialization is also happening in load_settings/initialize_default_settings. Clean that up.