anchor.diff:  1,"Stanford University"
   6,"Ruby"
   2,"RUBY"
  -3,"Public Domain"
  +5,"Public Domain"
   2,"Public Domain (CC0)"
   1,"Proprietary"
   1,"Perl Artistic v2"
   1,"MIT-LICENSE"
  -826,"MIT"
  +841,"MIT"
   1,"MIT License"
   1,"MIT (see LICENSE file)"
   1,"LPGL-3"
  
positive.code: 4,"GPLv3"
  2,"GPLv3 or later"
  1,"GPLv2"
  1,"GPL3"
  2,"GPL-3.0+"
  3,"GPL-3.0"
  6,"GPL-3"
  
negative.code: 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"
  