anchor.diff:  4,GPLv3
   2,GPLv2
   5,GPL3
  -11,GPL-3
  +12,GPL-3
   15,GPL-2
   1,GPL v3.0
   1,GPL Lv.3
  
positive.code: 4,Apache License Version 2.0
  1,Apache License version 2
  4,Apache License V2.0
  6,Apache License 2.0
  7,Apache License (2.0)
  1,Apache Licence 2.0
  43,Apache 2.0
  2,Apache 2
  8,Apache
  1,all of them
  
negative.code: 2,MIT License
  1,MIT (http://opensource.org/licenses/MIT)
  1,mit
  1373,MIT
  3,LGPLv3
  1,LGPLv2.1+
  1,LGPLv2.1
  