Simplify #inspect and #to_s output for App

lib/uppy/s3_multipart/app.rb

@@ -20,6 +20,11 @@ module Uppy
         @router.call(env)
       end
 
+      def inspect
+        "#<Uppy::S3Multipart::App>"
+      end
+      alias to_s inspect
+
       class Router < Roda
         plugin :all_verbs
         plugin :json

test/app_test.rb

@@ -373,4 +373,9 @@ describe Uppy::S3Multipart::App do
       assert_equal "bob",                   @s3.api_requests[0][:params][:request_payer]
     end
   end
+
+  it "defines #inspect and #to_s" do
+    assert_equal "#<Uppy::S3Multipart::App>", @endpoint.inspect
+    assert_equal "#<Uppy::S3Multipart::App>", @endpoint.to_s
+  end
 end