awk gensub documentation

[Valery Ushakov <uwe%stderr.spb.ru@localhost>]

My eye accidentally caught this phrase in awk(1), that says in the
description of gensub():

  Note that the ‘\n’ sequences within replacement string s supported
  by GNU awk are not supported at this moment.

I assume what it means to say is \<n> backreferences, not the 0xa NL
character, but I wanted to ask the audience.

-uwe