get_chars_in_line
Description:
Returns the number of characters in the line containing this, including the paragraph delimiters.
Parameters:
| this | 
           an iterator  | 
      
Returns:
| 
           number of characters in the line  | 
      
Returns the number of characters in the line containing this, including the paragraph delimiters.
| this | 
           an iterator  | 
      
| 
           number of characters in the line  |