how do you quote extra larch col in bootstrap4 code example

Example: boot strap columns

  

    

      1 of 3
    
    

      2 of 3 (wider)
    
    

      3 of 3
    
  
  

    

      1 of 3
    
    

      2 of 3 (wider)
    
    

      3 of 3