anchor.diff:  1,Ruby License
   4,Ruby
   2,R2CORBA
  +3,Public domain
   20,Public Domain
  -3,Public domain
   1,Proprietary
   1,PAL
   1,New-BSD
   3,New BSD License
  +1,MSU
   1,MPL-2.0
   1,MPL
   3,MIT-LICENSE
  
positive.code: 1,BSD-2-Clause
  8,BSD 3-Clause
  3,BSD 2-Clause
  28,BSD
  1,Beerware
  1,BAT
  4,Artistic 2.0
  1,APLv2
  1,APL 2.0
  1,apachev2
  1,apache2
  10,APACHE2
  3,Apache-2.0
  1,Apache, Version 2.0
  2,Apache v2
  7,Apache License, Version 2.0
  1,Apache License, v2.0
  4,Apache License Version 2.0
  1,Apache License version 2
  
negative.code: 1,AGPL3
  5,AGPL
  3,ACE
  1,3-Clause BSD
  1,3-clause BSD
  