--?     print('x: '..tostring(x)..'; '..tostring(State.right-x)..'px to go')

--?     print('x: '..tostring(x)..'; frag_width: '..tostring(frag_width)..'; '..tostring(State.right-x)..'px to go')

    -- carefully save settings

    -- reboot
    load_file_from_source_or_save_directory('main.lua')
    App.undo_initialize()
      App.run_tests()
      App.disable_tests()
      App.initialize_globals()

  App.snapshot_love()

-- save/restore various framework globals we care about -- only on very first load
function App.snapshot_love()
  if Love_snapshot then return end
  Love_snapshot = {}
  -- save the entire initial font; it doesn't seem reliably recreated using newFont
  Love_snapshot.initial_font = love.graphics.getFont()
end
function App.undo_initialize()
  love.graphics.setFont(Love_snapshot.initial_font)
end

* Unit tests don't run after you make changes, only when you restart the app.