anchor.diff:  1,BSD-3-clause
   7,BSD 3-Clause
   2,BSD 2-Clause
  -20,BSD
  +22,BSD
   1,Beerware
   4,Artistic 2.0
   1,APLv2
   1,apachev2
  +8,APACHE2
   1,apache2
  -8,APACHE2
   3,Apache-2.0
   2,Apache v2
  -6,Apache License, Version 2.0
  +7,Apache License, Version 2.0
   1,Apache License, v2.0
   4,Apache License Version 2.0
   1,Apache License version 2
  
positive.code: 4,GPLv3
  2,GPLv2
  4,GPL3
  7,GPL-3
  15,GPL-2
  1,GPL v3.0
  1,GPL Lv.3
  
negative.code: 2,MIT License
  1,MIT (http://opensource.org/licenses/MIT)
  1,mit
  1154,MIT
  2,LGPLv3
  1,LGPLv2.1+
  1,LGPLv2.1
  