code: def _rm_is_header_line(parts, n):
    
    if (n == 15 and parts[8] == "C"):
      return True
    if (n == 14 and parts[0].isdigit()):
      return True
docs: determine whether a pre-split string is a repeat-masker alignment header.
  
    headers have no special structure or symbol to mark them, so this is based
    only on the number of elements, and what data type they are.