ROOT (token: short_text [newlines/spaces])        
 ¦--expr:  [2/8]                                  
 ¦   ¦--expr:  [0/0]                              
 ¦   ¦   ¦--'{': { [1/0]                          
 ¦   ¦   ¦--expr:  [1/3]                          
 ¦   ¦   ¦   ¦--expr:  [0/0]                      
 ¦   ¦   ¦   ¦   ¦--expr:  [0/0]                  
 ¦   ¦   ¦   ¦   ¦   °--SYMBOL: z [0/0]           
 ¦   ¦   ¦   ¦   ¦--'(': ( [0/0]                  
 ¦   ¦   ¦   ¦   °--')': ) [0/0]                  
 ¦   ¦   ¦   ¦--'(': ( [0/0]                      
 ¦   ¦   ¦   ¦--',': , [0/1]                      
 ¦   ¦   ¦   °--')': ) [0/0]                      
 ¦   ¦   °--'}': } [0/0]                          
 ¦   ¦--'(': ( [0/0]                              
 ¦   ¦--',': , [0/1]                              
 ¦   °--')': ) [0/0]                              
 ¦--expr:  [3/2]                                  
 ¦   ¦--'(': ( [0/0]                              
 ¦   ¦--expr:  [0/0]                              
 ¦   ¦   ¦--'(': ( [0/0]                          
 ¦   ¦   ¦--expr:  [0/0]                          
 ¦   ¦   ¦   ¦--'{': { [0/0]                      
 ¦   ¦   ¦   ¦--expr:  [0/0]                      
 ¦   ¦   ¦   ¦   ¦--'{': { [1/2]                  
 ¦   ¦   ¦   ¦   ¦--expr:  [1/3]                  
 ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/0]              
 ¦   ¦   ¦   ¦   ¦   ¦   °--NUM_CONST: 26 [0/0]   
 ¦   ¦   ¦   ¦   ¦   ¦--'(': ( [1/2]              
 ¦   ¦   ¦   ¦   ¦   ¦--',': , [0/1]              
 ¦   ¦   ¦   ¦   ¦   ¦--',': , [1/16]             
 ¦   ¦   ¦   ¦   ¦   °--')': ) [0/0]              
 ¦   ¦   ¦   ¦   °--'}': } [0/0]                  
 ¦   ¦   ¦   °--'}': } [0/0]                      
 ¦   ¦   °--')': ) [0/0]                          
 ¦   °--')': ) [0/0]                              
 °--expr:  [0/0]                                  
     ¦--'(': ( [0/0]                              
     ¦--expr:  [0/0]                              
     ¦   ¦--'(': ( [0/0]                          
     ¦   ¦--expr:  [0/0]                          
     ¦   ¦   ¦--'{': { [0/0]                      
     ¦   ¦   ¦--expr:  [0/0]                      
     ¦   ¦   ¦   ¦--'{': { [1/7]                  
     ¦   ¦   ¦   ¦--expr:  [1/2]                  
     ¦   ¦   ¦   ¦   ¦--expr:  [0/0]              
     ¦   ¦   ¦   ¦   ¦   ¦--expr:  [0/1]          
     ¦   ¦   ¦   ¦   ¦   ¦   °--NUM_CONST: 1 [0/0]
     ¦   ¦   ¦   ¦   ¦   ¦--'+': + [0/1]          
     ¦   ¦   ¦   ¦   ¦   °--expr:  [0/0]          
     ¦   ¦   ¦   ¦   ¦       °--NUM_CONST: 1 [0/0]
     ¦   ¦   ¦   ¦   ¦--'(': ( [1/9]              
     ¦   ¦   ¦   ¦   ¦--',': , [0/1]              
     ¦   ¦   ¦   ¦   ¦--',': , [1/0]              
     ¦   ¦   ¦   ¦   ¦--expr:  [1/4]              
     ¦   ¦   ¦   ¦   ¦   °--NUM_CONST: 26 [0/0]   
     ¦   ¦   ¦   ¦   °--')': ) [0/0]              
     ¦   ¦   ¦   °--'}': } [0/0]                  
     ¦   ¦   °--'}': } [0/0]                      
     ¦   °--')': ) [0/0]                          
     °--')': ) [0/0]                              
