Vendor Rack 1.0.1

Incorporate patch from Revision 496.

vendor/plugins/rack/test/spec_rack_showexceptions.rb

@@ -0,0 +1,21 @@
+require 'test/spec'
+
+require 'rack/showexceptions'
+require 'rack/mock'
+
+context "Rack::ShowExceptions" do
+  specify "catches exceptions" do
+    res = nil
+    req = Rack::MockRequest.new(Rack::ShowExceptions.new(lambda { |env|
+                                                           raise RuntimeError
+                                                         }))
+    lambda {
+      res = req.get("/")
+    }.should.not.raise
+    res.should.be.a.server_error
+    res.status.should.equal 500
+
+    res.should =~ /RuntimeError/
+    res.should =~ /ShowExceptions/
+  end
+end