parameters: (self, e)
docstring: Copy the word before point to the kill buffer. The word
          boundaries are the same as backward-word. By default, this command
          is unbound.
docstring_summary: Copy the word before point to the kill buffer. The word
          boundaries are the same as backward-word. By default, this command
          is unbound.
docstring_tokens: Copy the word before point to the kill buffer . The word boundaries are the same as backward - word . By default this command is unbound .
function: def copy_backward_word(self, e):  # ()
          '''Copy the word before point to the kill buffer. The word
          boundaries are the same as backward-word. By default, this command
          is unbound.'''
          self.finalize()
function_tokens: def copy_backward_word ( self , e ) : # () self . finalize ( )