adding the silly hello world controller

cookbook/015/01/status/app/controllers/hello_controller.rb

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+class HelloController < ApplicationController
+  def world
+  end
+
+end

cookbook/015/01/status/app/helpers/hello_helper.rb

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+module HelloHelper
+end

cookbook/015/01/status/app/views/hello/world.html.erb

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+<h1>Several increasingly silly ways of displaying &ldquo;Hello world!&rdquo;:</h1>
+
+<p><%= "Hello world!" %></p>
+<p><%= "Hello" + " world!" %></p>
+<p><%= w = "world"
+            "Hello #{w}!" %></p>
+<p><%= 'H' + ?e.chr + ('l' * 2) %><%= ('o word!').gsub('d', 'ld')%></p>
+
+<% hello = "Hello" %>
+<% world = "world!" %>
+<%= hello %> <%= world %>