Hi, it seems that spotless doesn't check build.gradle files if applyGroovyNature() is not used in them. We noticed this during code review - spotless succeeded despite improper indentation in a build.gradle file. IMO, such files should be checked by default, so I created an issue for this: https://issues.apache.org/jira/browse/BEAM-7040 (currently, no one's assigned)
Łukasz
