Gemfile in logstash-output-email-3.0.5 vs Gemfile in logstash-output-email-4.0.0

@@ -1,2 +1,4 @@
 source 'https://rubygems.org'
-gemspec
\ No newline at end of file
+
+# Specify your gem's dependencies in logstash-mass_effect.gemspec
+gemspec