ROOT (token: short_text [lag_newlines/spaces] {pos_id})
 ¦--COMMENT: #' Do [0/0] {1}                           
 ¦--COMMENT: #' [1/0] {2}                              
 ¦--COMMENT: #' So [1/0] {3}                           
 ¦--COMMENT: #' @e [1/0] {4}                           
 ¦--COMMENT: #' g( [1/0] {5}                           
 ¦--COMMENT: #' \d [1/0] {6}                          
 ¦--COMMENT: #' f( [1/0] {7}                           
 ¦--COMMENT: #' } [1/0] {8}                            
 ¦--COMMENT: #' [1/0] {9}                              
 ¦--COMMENT: #' @e [1/0] {10}                          
 °--expr: g() [1/0] {11}                               
     ¦--expr: g [0/0] {13}                             
     ¦   °--SYMBOL_FUNCTION_CALL: g [0/0] {12}         
     ¦--'(': ( [0/0] {14}                              
     °--')': ) [0/0] {15}                              
