# mulitple functions

    Code
      prep(rec, training = iris %>% slice(1:75))
    Condition
      Error in `step_rename_at()`:
      Caused by error in `dplyr::rename_at()`:
      ! `.funs` must contain one renaming function, not 2.

# empty printing

    Code
      rec
    Message
      
      -- Recipe ----------------------------------------------------------------------
      
      -- Inputs 
      Number of variables by role
      outcome:    1
      predictor: 10
      
      -- Operations 
      * Variable renaming for: <none>

---

    Code
      rec
    Message
      
      -- Recipe ----------------------------------------------------------------------
      
      -- Inputs 
      Number of variables by role
      outcome:    1
      predictor: 10
      
      -- Training information 
      Training data contained 32 data points and no incomplete rows.
      
      -- Operations 
      * Variable renaming for: <none> | Trained

# printing

    Code
      print(rec)
    Message
      
      -- Recipe ----------------------------------------------------------------------
      
      -- Inputs 
      Number of variables by role
      predictor: 5
      
      -- Operations 
      * Variable renaming for: contains("Sepal")

---

    Code
      prep(rec)
    Message
      
      -- Recipe ----------------------------------------------------------------------
      
      -- Inputs 
      Number of variables by role
      predictor: 5
      
      -- Training information 
      Training data contained 150 data points and no incomplete rows.
      
      -- Operations 
      * Variable renaming for: Sepal.Length and Sepal.Width | Trained

