diff --git a/actionpack/lib/action_dispatch/http/response.rb b/actionpack/lib/action_dispatch/http/response.rb
index 87603190017c86ca9fd25dda0b804951d5af6dad..15ccfa273552a93efaa1f4a951d3cbfeac1564d9 100644
--- a/actionpack/lib/action_dispatch/http/response.rb
+++ b/actionpack/lib/action_dispatch/http/response.rb
@@ -172,7 +172,8 @@ def to_path
       stream.to_path
     end
 
-    # Returns the content of the response as a String.
+    # Returns the content of the response as a String. This contains the contents
+    # of any calls to <tt>render</tt>.
     def body
       strings = []
       each { |part| strings << part.to_s }
@@ -181,6 +182,7 @@ def body
 
     EMPTY = " "
 
+    # Allows you to set manually set or override the response body.
     def body=(body)
       @blank = true if body == EMPTY