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