anchor.diff:  1,GPLv3+
   4,GPLv3
   2,GPLv2
  -4,GPL3
  -9,GPL-3
  +5,GPL3
  +10,GPL-3
   15,GPL-2
   1,GPL v3.0
   1,GPL Lv.3
  
positive.code: 1,AGPL3
  5,AGPL
  1,3-clause BSD
  
negative.code: 1,MIT, Apache License v2.0
  2,MIT License
  1,MIT (http://opensource.org/licenses/MIT)
  1287,MIT
  1,mit
  3,LGPLv3
  1,LGPLv2.1+
  1,LGPLv2.1
  