Clarify and make double rendering documentation consistent

An action can _contain_ multiple renders/redirects, but only one can be _performed_.

"Attempting to try to" is redundant.

Also removes the `and return` recommendation in order to be consistent with the documentation updates from rails#45927

Author: artfuldodger

actionpack/lib/action_controller/base.rb

@@ -185,19 +185,22 @@ module ActionController
   #
   # ## Calling multiple redirects or renders
   #
-  # An action may contain only a single render or a single redirect. Attempting to
-  # try to do either again will result in a DoubleRenderError:
+  # An action may perform only a single render or a single redirect. Attempting to
+  # do either again will result in a DoubleRenderError:
   #
   #     def do_something
   #       redirect_to action: "elsewhere"
   #       render action: "overthere" # raises DoubleRenderError
   #     end
   #
   # If you need to redirect on the condition of something, then be sure to add
-  # "and return" to halt execution.
+  # "return" to halt execution.
   #
   #     def do_something
-  #       redirect_to(action: "elsewhere") and return if monkeys.nil?
+  #       if monkeys.nil?
+  #         redirect_to(action: "elsewhere")
+  #         return
+  #       end
   #       render action: "overthere" # won't be called if monkeys is nil
   #     end
   #