code: def _new_lnotab(instrs, lnotab):
      
      return {
          lno: _a_if_not_none(instr._stolen_by, instr)
          for lno, instr in lnotab.items()
      }
docs: The updated lnotab after the instructions have been transformed.
  
      Parameters
      ----------
      instrs : iterable[Instruction]
          The new instructions.
      lnotab : dict[Instruction -> int]
          The lnotab for the old code object.
  
      Returns
      -------
      new_lnotab : dict[Instruction -> int]
          The post transform lnotab.