https://mvnrepository.com/artifact/com.googlecode.java-diff-utils/diffutils
https://bintray.com/bintray/jcenter/com.googlecode.java-diff-utils:diffutils

https://github.com/is/java-diff-utils
https://github.com/dnaumenko/java-diff-utils
http://javadox.com/com.googlecode.java-diff-utils/diffutils/