parameters: (self, e)
docstring: Move back to the start of the current or previous word. Words are
          composed of letters and digits.
docstring_summary: Move back to the start of the current or previous word. Words are
          composed of letters and digits.
docstring_tokens: Move back to the start of the current or previous word . Words are composed of letters and digits .
function: def backward_word_extend_selection(self, e):  #
          """Move back to the start of the current or previous word. Words are
          composed of letters and digits."""
          self.l_buffer.backward_word_extend_selection(self.argument_reset)
          self.finalize()
function_tokens: def backward_word_extend_selection ( self , e ) : # self . l_buffer . backward_word_extend_selection ( self . argument_reset ) self . finalize ( )