code: def remap_file_lines(from_path, to_path, line_map_list):
      
      from_path = pyc2py(from_path)
      cache_file(to_path)
      remap_entry = file2file_remap_lines.get(to_path)
      if remap_entry:
          new_list = list(remap_entry.from_to_pairs) + list(line_map_list)
      else:
          new_list = line_map_list
      # FIXME: look for duplicates ?
      file2file_remap_lines[to_path] = RemapLineEntry(
          from_path,
          tuple(sorted(new_list, key=lambda t: t[0]))
          )
      return
docs: Adds line_map list to the list of association of from_file to
         to to_file