walk back changes
    
    
      
        Getty Ritter
        4 years ago
      
    
    
  
  
  
  
    
      
      
      
        
          | 212 | 212 | (substring str 0 i)) | 
| 213 | 213 |  | 
| 214 | 214 | (define (string-drop str i) | 
| 215 |  | (let ((l ( - (string-length str) 1))) | 
|  | 215 | (let ((l (string-length str))) | 
| 216 | 216 | (substring str i l))) | 
| 217 | 217 |  | 
| 218 | 218 | (define (gather-para document) |