Reorganize output writing

testing/resources/ruby_versioned_hooks_repo/bin/ruby_hook

@@ -1,5 +1,4 @@
 #!/usr/bin/env ruby
 
 puts RUBY_VERSION
-puts RUBY_PATCHLEVEL
 puts 'Hello world from a ruby hook'

testing/resources/ruby_versioned_hooks_repo/hooks.yaml

@@ -2,5 +2,5 @@
     name: Ruby Hook
     entry: ruby_hook
     language: ruby
-    language_version: 1.9.3-p551
+    language_version: 2.1.5
     files: \.rb$