Remove use of hashrocket in 'Delete' link code

These days, the "Destroy" link for a scaffolded object defaults to using
new-style symbol syntax.

This also changes the link from
  confirm: 'Message'
to
  data: {confirm: 'Message'}
which is the way the scaffolds currently do it.

confirm: 'message' is deprecated in rails 4.

Author: tjgrathwell

sites/curriculum/CRUD_with_scaffolding.step

@@ -23,7 +23,7 @@ steps {
     message "Point your browser to [http://localhost:3000/topics](http://localhost:3000/topics)"
     message "You should see a page listing topics that looks something like this:"
 
-    img :src => "img/Seattle_topic_list_page.png", :alt => "Topic List Page"
+    img src: "img/Seattle_topic_list_page.png", alt: "Topic List Page"
   }
 
   step {
@@ -33,7 +33,7 @@ steps {
   * You should see a confirmation page like this:
     MARKDOWN
 
-    img :alt=> "topic created", :src => "img/Seattle_topic_created.png"
+    img alt: "topic created", src: "img/Seattle_topic_created.png"
   }
 
   step {

sites/curriculum/clean_up_links_on_the_topics_list.step

@@ -21,7 +21,7 @@ steps {
   step "Change 'destroy' to 'delete'" do
 
     message "Change the line with the word 'Destroy' to this:"
-    source_code :erb, "<td><%= link_to 'Delete', topic, :confirm => 'Are you sure?', :method => :delete %></td>"
+    source_code :erb, "<td><%= link_to 'Delete', topic, method: :delete, data: { confirm: 'Are you sure?' } %></td>"
   end
 
   step "Confirm your changes" do

sites/curriculum/creating_a_migration.step

@@ -1,6 +1,6 @@
 goals {
 
-  img :alt => "Topics Table", :src => "img/topics_table.png"
+  img alt: "Topics Table", src: "img/topics_table.png"
 
   message "The suggestotron has a list of topics that people can vote on. We'll store our topics in the database. In this step you'll do the following:"
 
@@ -40,7 +40,7 @@ explanation {
 
   h2 "Explaining MVC and Records"
 
-  img :src => "img/mvc.png", :alt => "MVC"
+  img src: "img/mvc.png", alt: "MVC"
 
   message "Rails implements a very specific notion of the **Model/View/Controller** pattern, which guides how you structure your web applications."
 

sites/curriculum/deploying_to_heroku.step

@@ -1,12 +1,12 @@
 h2 do 
   span "If you haven't yet deployed to heroku, start at "
-  a 'First-time setup', :href => '#first-time'
+  a 'First-time setup', href: '#first-time'
   span ". Otherwise, start at "
-  a 'Every time', :href => '#every-time'
+  a 'Every time', href: '#every-time'
   span "."
 end
 
-a :name => 'first-time'
+a name: 'first-time'
 situation "First-time setup" do
   step "Create a heroku application" do
     console "heroku create"
@@ -50,7 +50,7 @@ git commit -m "Changed Gemfile for heroku"
   end
 end
 
-a :name => 'every-time'
+a name: 'every-time'
 situation "Every time" do
   step "Commit any pending changes to git" do
     message "Heroku will only receive the files we've committed into our local git repository. So we need to make sure all changed files have been committed."
@@ -98,7 +98,7 @@ explanation do
   MARKDOWN
 
   message "You should be able to deploy your application any time it's in a good, working state. Your typical workflow will look like:"
-  img :src => "img/workflow.png", :alt => "workflow", :style => "border: none"
+  img src: "img/workflow.png", alt: "workflow", style: "border: none"
   ol do
     li { message "Add or change some code" }
     li { message "Commit your changes (`git commit`)" }

sites/curriculum/getting_started.step

@@ -1,5 +1,5 @@
 
-img :src => "img/Start_page.png", :alt => "Start Page"
+img src: "img/Start_page.png", alt: "Start Page"
 
 goals do
   goal "Create Your New Application"
@@ -45,7 +45,7 @@ steps do
   files. The ones we want to focus on today are:
   MARKDOWN
 
-  table :border=>"1", :cellspacing=>"0", :cellpadding=>"3", :align=>"center" do
+  table border: "1", cellspacing: "0", cellpadding: "3", align: "center" do
     tr {
       th "File/Folder"
       th "Purpose"

sites/curriculum/hooking_up_votes_and_topics.step

@@ -1,6 +1,6 @@
 goals {
 
-  img :alt => "topics_and_votes_table", :src => "img/topics_and_votes_table.png"
+  img alt: "topics_and_votes_table", src: "img/topics_and_votes_table.png"
 
   goal "Because there is an explicit relationship between a topic and its
   votes, we need to specify that. In this step, we'll explicitly

sites/curriculum/setting_the_default_page.step

@@ -16,10 +16,6 @@ steps {
     message "Open `config/routes.rb`. Near the end of the file but before the final end add `root :to => 'topics#index'`. When you are done the last few lines should look like this:"
 
     source_code :ruby, <<-RUBY
-# This is a legacy wild controller route that's not recommended for RESTful applications.
-# Note: This route will make all actions in every controller accessible via GET requests.
-# match ':controller(/:action(/:id(.:format)))'
-
 root :to => 'topics#index'
     RUBY
   end

sites/curriculum/voting_on_topics.step

@@ -2,7 +2,7 @@
 goals {
   goal "Create a model for votes"
 
-  img :alt => "Topics Table", :src => "img/votes_table.png"
+  img alt: "Topics Table", src: "img/votes_table.png"
 
   message "Every topic in suggestotron can be voted on. In order to count votes, we need to record votes. We'll add that table now."
 }