Included more details on Rails coding conventions (from LH Source Style page)

railties/guides/source/contributing_to_ruby_on_rails.textile

@@ -300,10 +300,16 @@ h4. Follow the Coding Conventions
 
 Rails follows a simple set of coding style conventions.
 
-* Two spaces, no tabs
-* Prefer +&&+/+||+ over +and+/+or+
-* +MyClass.my_method(my_arg)+ not +my_method( my_arg )+ or +my_method my_arg+
-* Follow the conventions you see used in the source already
+* Two spaces, no tabs.
+* No trailing whitespace. Blank lines should not have any space.
+* Indent after private/protected.
+* Prefer +&&+/+||+ over +and+/+or+.
+* Prefer class << self block over self.method for class methods.
+* +MyClass.my_method(my_arg)+ not +my_method( my_arg )+ or +my_method my_arg+.
+* a = b and not a=b.
+* Follow the conventions you see used in the source already.
+
+These are some guidelines and please use your best judgement in using them.
 
 h4. Sanity Check