revises some <%= in rdoc

actionpack/lib/action_controller/metal/helpers.rb

@@ -36,7 +36,7 @@ module ActionController
   #
   #   <% @events.each do |event| -%>
   #     <p>
-  #       <% format_time(event.time, :short, "N/A") %> | <%= event.name %>
+  #       <%= format_time(event.time, :short, "N/A") %> | <%= event.name %>
   #     </p>
   #   <% end -%>
   #

actionpack/lib/action_controller/record_identifier.rb

@@ -9,7 +9,7 @@ module ActionController
   #   resources :posts
   #
   #   # view
-  #   <% div_for(post) do %>     <div id="post_45" class="post">
+  #   <%= div_for(post) do %>    <div id="post_45" class="post">
   #     <%= post.body %>           What a wonderful world!
   #   <% end %>                  </div>
   #

actionpack/lib/action_view/base.rb

@@ -24,9 +24,10 @@ class NonConcattingString < ActiveSupport::SafeBuffer
   # The loop is setup in regular embedding tags <% %> and the name is written using the output embedding tag <%= %>. Note that this
   # is not just a usage suggestion. Regular output functions like print or puts won't work with ERb templates. So this would be wrong:
   #
+  #   <%# WRONG %>
   #   Hi, Mr. <% puts "Frodo" %>
   #
-  # If you absolutely must write from within a function, you can use the TextHelper#concat.
+  # If you absolutely must write from within a function use +concat+.
   #
   # <%- and -%> suppress leading and trailing whitespace, including the trailing newline, and can be used interchangeably with <% and %>.
   #

actionpack/lib/action_view/helpers/form_tag_helper.rb

@@ -183,7 +183,7 @@ def hidden_field_tag(name, value = nil, options = {})
       # Creates a file upload field.  If you are using file uploads then you will also need
       # to set the multipart option for the form tag:
       #
-      #   <% form_tag '/upload', :multipart => true do %>
+      #   <%= form_tag '/upload', :multipart => true do %>
       #     <label for="file">File to Upload</label> <%= file_field_tag "file" %>
       #     <%= submit_tag %>
       #   <% end %>