anchor.diff:  3,"GPL-3.0"
   6,"GPL-3"
   1,"GPL-2.0"
  -9,"GPL-2"
  +11,"GPL-2"
   4,"GPL"
   2,"GPL 3"
   9,"GPL 2"
  
positive.code: 1,"Proprietary"
  1,"Perl Artistic v2"
  1,"MIT-LICENSE"
  786,"MIT"
  1,"MIT License"
  1,"MIT (see LICENSE file)"
  1,"LPGL-3"
  
negative.code: 1,"BSD-3"
  6,"BSD-2-Clause"
  2,"BSD-2"
  9,"BSD"
  1,"BSD 3-Clause"
  1,"BSD 2-Clause"
  1,"Boost"
  1,"Beerware"
  2,"Artistic 2.0"
  2,"APLv2"
  1,"apachev2"
  1,"APACHE2"
  10,"Apache-2.0"
  7,"Apache"
  1,"Apache v2.0"
  1,"Apache v2"
  7,"Apache License, Version 2.0"
  