anchor.diff:  
   == Requirements
   
  -Both `flac` and `metaflac` need to be in your $PATH.  These programs
  -are normally packaged together as “flac” by distributions.
  +`flac` needs to be in your $PATH.  This program is normally packaged
  +as “flac” by distributions.
   
   The script both depends on Bash and GNU features of other core
   utilities.  Versions of `mv`, `getopt`, `sync`, etc from other sources
  
positive.code:  -8 --best       Use the slowest, but best, compression possible.
   -n --no-action  Do not recompress.  With --verbose, displays a list of
                   files that would be processed.
   -p --preserve   Preserve file modification time.
   -r --recursive  Recurse into directories.
   -s --no-sync    Do not synchronize file data.  Will return faster, with
                   the potential danger to lose your files in a system crash.
  
negative.code: maintaining the existing compression as well as the existing tags.
  
  The choice is left to the user for repairing the file manually, such
  as by using `metaflac`, or removing the temporary directory
  altogether.  The author uses, and recommends,
  https://picard.musicbrainz.org/[MusicBrainz Picard] to retag files
  before using `reflac`.
  