anchor.diff:  4,GPLv3
   2,GPLv2
   4,GPL3
  -8,GPL-3
  +9,GPL-3
   15,GPL-2
   1,GPL v3.0
   1,GPL Lv.3
  
positive.code: 7,Apache License (2.0)
  1,Apache Licence 2.0
  40,Apache 2.0
  1,Apache 2
  8,Apache
  1,all of them
  4,AGPL
  1,3-clause BSD
  
negative.code: 2,MIT License
  1,MIT (http://opensource.org/licenses/MIT)
  1,mit
  1230,MIT
  2,LGPLv3
  1,LGPLv2.1+
  1,LGPLv2.1
  