Revert "refer to guides since 3.0 is released now"
Reason: This is an exception. Thing is when you contribute to Rails you need to know how to proceed *now*, the instructions may be different than the ones published with some past release. This reverts commit 3d13dc8.
|@@ -1437,7 +1437,7 @@ Afterwards this includes the +ActiveSupport::Benchmarkable+ which is used for be|
|-The "documentation":http://api.rubyonrails.org/classes/ActiveSupport/Benchmarkable.html is great about explaining what precisely this does.|
|+The "documentation":http://api.rails.info/classes/ActiveSupport/Benchmarkable.html#M000607 is great about explaining what precisely this does. (TODO: replace link with real documentation link when it becomes available.)|
|This module is also included into Active Record and +AbstractController+, meaning you can also use the +benchmark+ method in these methods.|