Merge pull request #7015 from sikachu/3-2-stable-code-style

Update coding convention from master

railties/guides/source/contributing_to_ruby_on_rails.textile

@@ -307,16 +307,16 @@ h4. Follow the Coding Conventions
 
 Rails follows a simple set of coding style conventions.
 
-* Two spaces, no tabs.
-* No trailing whitespace. Blank lines should not have any space.
-* Do not indent after private/protected. Private/protected should have the same indentation as the methods around.
+* Two spaces, no tabs (for indentation).
+* No trailing whitespace. Blank lines should not have any spaces.
+* 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.
+* Prefer class << self over self.method for class methods.
+* Use +MyClass.my_method(my_arg)+ not +my_method( my_arg )+ or +my_method my_arg+.
+* Use a = b and not a=b.
+* Follow the conventions in the source you see used already.
 
-These are some guidelines and please use your best judgment in using them.
+The above are guidelines -- please use your best judgment in using them.
 
 h4. Sanity Check