Delete X-Cascade header for default behavior.

CHANGELOG.markdown

@@ -1,7 +1,7 @@
 Next Release
 ============
 
-* [#340](https://github.com/intridea/grape/pull/339): Allow rack/mount cascading to be skipped on header - [@dieb](https://github.com/dieb).
+* [#340](https://github.com/intridea/grape/pull/339), [#342](https://github.com/intridea/grape/pull/342): Added `:cascade` option to `version` to allow disabling of rack/mount cascade behavior - [@dieb](https://github.com/dieb).
 * [#333](https://github.com/intridea/grape/pull/333): Validation for array in params - [@flyerhzm](https://github.com/flyerhzm).
 * [#306](https://github.com/intridea/grape/issues/306): Added I18n support for all Grape exceptions - [@niedhui](https://github.com/niedhui).
 * [#294](https://github.com/intridea/grape/issues/294): Extracted `Grape::Entity` into a [grape-entity](https://github.com/agileanimal/grape-entity) gem - [@agileanimal](https://github.com/agileanimal).

README.markdown

@@ -660,7 +660,7 @@ end
 
 When mounted inside Rails 3.x, errors like "404 Not Found" or "406 Not Acceptable" will likely be
 handled and rendered by Rails handlers. For instance, accessing a nonexistent route "/api/foo"
-raises a 404, which inside rails will ultimately be translated to a ActionController::RoutingError,
+raises a 404, which inside rails will ultimately be translated to an `ActionController::RoutingError`,
 which most likely will get rendered to a HTML error page.
 
 Most APIs will enjoy avoiding Rails exceptions and have their own exceptions reaching the client.

lib/grape/api.rb

@@ -458,8 +458,8 @@ def initialize
 
     def call(env)
       status, headers, body = @route_set.call(env)
-      headers['X-Cascade'] = '' unless cascade?
-      [status, headers, body]
+      headers.delete('X-Cascade') unless cascade?
+      [ status, headers, body ]
     end
 
     # Some requests may return a HTTP 404 error if grape cannot find a matching

spec/grape/api_spec.rb

@@ -1867,7 +1867,7 @@ def serializable_hash
       subject.version 'v2', :using => :path, :cascade => false
       get "/v2/hello"
       last_response.status.should == 404
-      last_response.headers["X-Cascade"].should == ""
+      last_response.headers.keys.should_not include "X-Cascade"
     end
   end
 end