(temporary hack) generate a main file for RDoc escaping "Rails"

RDoc autolinks the word "Rails" to the doc page for the Rails module.
But README.rdoc is displayed in the home page at GitHub and the slashes
are visible there, which is weird. We leave by now the slashes off in
the file, and generate a second file for the API with them.

.gitignore

@@ -22,3 +22,4 @@ railties/doc
 railties/guides/output
 railties/tmp
 .rvmrc
+RDOC_MAIN.rdoc

README.rdoc

@@ -1,6 +1,6 @@
-== Welcome to \Rails
+== Welcome to Rails
 
-\Rails is a web-application framework that includes everything needed to create
+Rails is a web-application framework that includes everything needed to create
 database-backed web applications according to the Model-View-Control pattern.
 
 This pattern splits the view (also called the presentation) into "dumb"
@@ -11,7 +11,7 @@ persist themselves to a database. The controller handles the incoming requests
 (such as Save New Account, Update Product, Show Post) by manipulating the model
 and directing data to the view.
 
-In \Rails, the model is handled by what's called an object-relational mapping
+In Rails, the model is handled by what's called an object-relational mapping
 layer entitled Active Record. This layer allows you to present the data from
 database rows as objects and embellish these data objects with business logic
 methods. You can read more about Active Record in its
@@ -22,17 +22,17 @@ layers by its two parts: Action View and Action Controller. These two layers
 are bundled in a single package due to their heavy interdependence. This is
 unlike the relationship between the Active Record and Action Pack that is much
 more separate. Each of these packages can be used independently outside of
-\Rails. You can read more about Action Pack in its
+Rails. You can read more about Action Pack in its
 {README}[link:files/actionpack/README_rdoc.html].
 
 
 == Getting Started
 
-1. Install \Rails at the command prompt if you haven't yet:
+1. Install Rails at the command prompt if you haven't yet:
 
     gem install rails
 
-2. At the command prompt, create a new \Rails application:
+2. At the command prompt, create a new Rails application:
 
     rails new myapp
 
@@ -59,10 +59,10 @@ more separate. Each of these packages can be used independently outside of
 
 == Contributing
 
-We encourage you to contribute to Ruby on \Rails! Please check out the {Contributing to Rails
+We encourage you to contribute to Ruby on Rails! Please check out the {Contributing to Rails
 guide}[http://edgeguides.rubyonrails.org/contributing_to_rails.html] for guidelines about how
 to proceed. {Join us}[http://contributors.rubyonrails.org]!
 
 == License
 
-Ruby on \Rails is released under the MIT license.
+Ruby on Rails is released under the MIT license.

Rakefile

@@ -49,14 +49,24 @@ end
 
 desc "Generate documentation for the Rails framework"
 RDoc::Task.new do |rdoc|
+  RDOC_MAIN = 'RDOC_MAIN.rdoc'
+
+  rdoc.before_running_rdoc do
+    rdoc_main = File.read('README.rdoc')
+    rdoc_main.gsub!(/\b(?=Rails)\b/) { '\\' }
+    File.open(RDOC_MAIN, 'w') do |f|
+      f.write(rdoc_main)
+    end
+
+    rdoc.rdoc_files.include(RDOC_MAIN)
+  end
+
   rdoc.rdoc_dir = 'doc/rdoc'
   rdoc.title    = "Ruby on Rails Documentation"
 
   rdoc.options << '-f' << 'horo'
   rdoc.options << '-c' << 'utf-8'
-  rdoc.options << '-m' << 'README.rdoc'
+  rdoc.options << '-m' << RDOC_MAIN
-
-  rdoc.rdoc_files.include('README.rdoc')
 
   rdoc.rdoc_files.include('railties/CHANGELOG')
   rdoc.rdoc_files.include('railties/MIT-LICENSE')