parameters: (self, additional_seq)
docstring: Adds the given sequence to the end of the forward sequence (and updates the reverse
          sequence accordingly).
docstring_summary: Adds the given sequence to the end of the forward sequence (and updates the reverse
          sequence accordingly).
docstring_tokens: Adds the given sequence to the end of the forward sequence ( and updates the reverse sequence accordingly ) .
function: def append_to_forward_sequence(self, additional_seq):
          """
          Adds the given sequence to the end of the forward sequence (and updates the reverse
          sequence accordingly).
          """
          self.forward_sequence = self.forward_sequence + additional_seq
          self.reverse_sequence = reverse_complement(self.forward_sequence)
function_tokens: def append_to_forward_sequence ( self , additional_seq ) : self . forward_sequence = self . forward_sequence + additional_seq self . reverse_sequence = reverse_complement ( self . forward_sequence )