Incomplete code comment in Chapter 15

[Yang-Hu]

The code chunk just above section B. Be sure it is tested seems incomplete in both printed book and the online version.

Specifically (where the <<<<<< is) :

server <- function(
  input, 
  output, 
  session
){
  # We start by creating a new instance of th    <<<<<<
  r6 <- MyDataProcessing$new()
  # Passing this object to the two server functions
  mod_data_cleaning_server("data_cleaning_ui_1", r6)
  mod_plotting_server("plotting_ui_1", r6)

}

...