exe/ssl-info in ssl_info-0.1.0 vs exe/ssl-info in ssl_info-1.0.0

@@ -29,20 +29,20 @@
         end
     end
 
     begin
         optparse.parse!
-        options[:message] = ARGF.read if !STDIN.tty? # override message parameter if data is piped in
+        options[:message] = ARGF.read unless STDIN.tty? # override message parameter if data is piped in
         missing = mandatory.select { |param| options[param].nil? }
         raise OptionParser::MissingArgument.new(missing.join(', ')) unless missing.empty?
     rescue OptionParser::InvalidOption, OptionParser::MissingArgument => e
         puts e.to_s
         puts optparse
         exit
     end
 
     SSLInfo.get_cert(options[:domain])
-    SSLInfo.display_cert
+    SSLInfo.display_cert unless SSLInfo.cert.nil?
 end
 
 # -------------------------------------------------------------------------------- #
 # Main()                                                                           #
 # -------------------------------------------------------------------------------- #