anchor.diff:  Puppet,programming
   Pure Data,programming
   PureScript,programming
  -interpreters,unknown/other
  +Python,programming
   Python traceback,data
   QML,markup
   QMake,unknown/other
  -interpreters,unknown/other
  +R,programming
   RDoc,prose
   REALbasic,programming
   RHTML,markup
  
positive.code: Redcode,unknown/other
  RobotFramework,programming
  Rouge,programming
  interpreters,unknown/other
  Rust,programming
  SAS,programming
  SCSS,markup
  
negative.code: Ox,programming
  Oxygene,programming
  PAWN,programming
  PHP,programming
  Pan,programming
  Parrot,programming
  Parrot Internal Representation,programming
  Parrot Assembly,programming
  Pascal,programming
  Perl,programming
  Perl6,programming
  PigLatin,programming
  Pike,programming
  