Some tools work better when files end with an empty line. This rule simply generates an issue if it is missing. For example, a Git diff looks like this if the empty line is missing at the end of the file: ---- +class Test +{ +} \ No newline at end of file ---- ifdef::env-github,rspecator-view[] ''' == Implementation Specification (visible only on this page) include::../message.adoc[] ''' == Comments And Links (visible only on this page) include::../comments-and-links.adoc[] endif::env-github,rspecator-view[]