ruby2.5-rubygem-treetop-1_4.x86_64: W: description-shorter-than-summary
rubygem-treetop-1_4.src: W: description-shorter-than-summary
The package description should be longer than the summary. be a bit more
verbose, please.

ruby2.5-rubygem-treetop-testsuite-1_4.x86_64: W: filename-too-long-for-joliet ruby2.5-rubygem-treetop-testsuite-1_4-1.4.15-bp155.2.10.x86_64.rpm
This filename is too long to fit on a joliet filesystem (limit is 64 unicode
chars).

ruby2.5-rubygem-treetop-testsuite-1_4.x86_64: W: files-duplicate /usr/lib64/ruby/gems/2.5.0/gems/treetop-1.4.15/spec/compiler/test_grammar.treetop /usr/lib64/ruby/gems/2.5.0/gems/treetop-1.4.15/spec/compiler/test_grammar.tt
ruby2.5-rubygem-treetop-1_4.x86_64: W: zero-length /usr/lib64/ruby/gems/2.5.0/gems/treetop-1.4.15/examples/lambda_calculus/lambda_calculus
4 packages and 0 specfiles checked; 0 errors, 5 warnings.