parameters: (self)
docstring: Forget about the previous line if it is a blank line.
docstring_summary: Forget about the previous line if it is a blank line.
docstring_tokens: Forget about the previous line if it is a blank line .
function: def del_blank_line(self):
          """Forget about the previous line if it is a blank line."""
          if self.prev_line is not None and not self.prev_line.strip():
              self.prev_line = None
function_tokens: def del_blank_line ( self ) : if self . prev_line is not None and not self . prev_line . strip ( ) : self . prev_line = None