ruby2.5-rubygem-rdiscount.s390x: W: description-shorter-than-summary
rubygem-rdiscount.src: W: description-shorter-than-summary
The package description should be longer than the summary. be a bit more
verbose, please.

ruby2.5-rubygem-rdiscount.s390x: W: hidden-file-or-dir /usr/lib64/ruby/gems/2.5.0/gems/rdiscount-2.2.0.1/ext/.sitearchdir.time
The file or directory is hidden. You should see if this is normal, and delete
it from the package if not.

ruby2.5-rubygem-rdiscount.s390x: W: zero-length /usr/lib64/ruby/gems/2.5.0/extensions/s390x-linux/2.5.0/rdiscount-2.2.0.1/gem.build_complete
ruby2.5-rubygem-rdiscount.s390x: W: zero-length /usr/lib64/ruby/gems/2.5.0/gems/rdiscount-2.2.0.1/ext/.sitearchdir.time
4 packages and 0 specfiles checked; 0 errors, 5 warnings.