anchor.diff:  2,"GPL3"
   2,"GPL-3.0+"
   3,"GPL-3.0"
  -6,"GPL-3"
  +8,"GPL-3"
   1,"GPL-2.0"
   11,"GPL-2"
   4,"GPL"
  
positive.code: 1,"Proprietary"
  1,"Perl Artistic v2"
  1,"MIT-LICENSE"
  841,"MIT"
  1,"MIT License"
  1,"MIT (see LICENSE file)"
  1,"LPGL-3"
  
negative.code: 1,"BSD-3"
  6,"BSD-2-Clause"
  2,"BSD-2"
  10,"BSD"
  1,"BSD 3-Clause"
  1,"BSD 2-Clause"
  1,"Boost"
  