anchor.diff:  1,"Apache v2"
   7,"Apache License, Version 2.0"
   1,"Apache License, v2"
  +1,"Apache License Version 2.0"
   3,"Apache License 2.0"
   2,"Apache License (2.0)"
   1,"Apache Licence v2"
   15,"Apache 2.0"
   1,"Apache 2"
   1,"ALv2"
  +1,"All right reserved."
   1,"AGPL3"
   1,"AGPL-3.0"
  
positive.code: 1,"Stanford University"
  6,"Ruby"
  2,"RUBY"
  3,"Public Domain"
  2,"Public Domain (CC0)"
  1,"Proprietary"
  1,"Perl Artistic v2"
  1,"MIT-LICENSE"
  826,"MIT"
  1,"MIT License"
  1,"MIT (see LICENSE file)"
  1,"LPGL-3"
  
negative.code: 4,"GPLv3"
  2,"GPLv3 or later"
  1,"GPLv2"
  2,"GPL3"
  2,"GPL-3.0+"
  3,"GPL-3.0"
  6,"GPL-3"
  