Clarify the body.close spec section

 * This item is frequently missed, including in core.
 * This is not a change in semantic requirement, and does not update the SPEC
   version.

1 files changed, 3 insertions, 1 deletions

diff --git a/lib/rack/lint.rb b/lib/rack/lint.rb
index 3cd28e5e..3290be06 100644
--- a/lib/rack/lint.rb
+++ b/lib/rack/lint.rb
@@ -529,7 +529,9 @@ module Rack
       ## The Body itself should not be an instance of String, as this will
       ## break in Ruby 1.9.
       ##
-      ## If the Body responds to +close+, it will be called after iteration.
+      ## If the Body responds to +close+, it will be called after iteration. If
+      ## the body is replaced by a middleware after action, the original body
+      ## must be closed first, if it repsonds to close.
       # XXX howto: assert("Body has not been closed") { @closed }