playing with IFS

[Ray Andrews <rayandrews@xxxxxxxxxxx>]

    Trying to optimize some code:
      
      % output=( ${(f) "$( print -rl $output | sed [cut] )" } )
      
      ... replace with hear document:
      
      OLDIFS=$IFS; IFS=$'\n'
      % output=( $( sed [cut]' <<< $output ) )
      IFS=$OLDIFS
      
      ... probably better, but it won't work without tinkering with
      IFS.  Can that be avoided?  I expect that the '<<<'
      mechanism might be unable to match the tuning of print with those
      options set, but perhaps there's a way.  Anyway, nice to avoid the
      pipe.