grep (3.6-1) unstable; urgency=low

  From upstream's NEWS:

  The GREP_OPTIONS environment variable no longer affects grep's behavior.
  The variable was declared obsolescent in grep 2.21 (2014), and since
  then any use had caused grep to issue a diagnostic.

 -- Santiago Ruano Rincón <santiago@debian.org>  Mon, 09 Nov 2020 10:57:22 +0100