/usr/share/doc/ruby-rails-assets-jquery-nicescroll/changelog.Debian.gz is in ruby-rails-assets-jquery-nicescroll 3.6.6-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/doc/ruby-rails-assets-jquery-nicescroll/../libjs-jquery-nicescroll/changelog.Debian.gz