improve test

Author: fey

modules/10-basics/10-hello-world/test.rb

@@ -4,7 +4,7 @@
 
 describe 'output' do
   it 'should works' do
-    _(-> { require_relative 'index' }).must_output(/Hello, World!/)
+    _(-> { require_relative 'index' }).must_output(/^Hello, World!$/)
     puts 'Hello, World!'
   end
 end