Removes trailing whitespace

Removes trailing whitespace

diff --git a/lib/message_bus/rack/middleware.rb b/lib/message_bus/rack/middleware.rb
index 6e5fcee..2bc3d39 100644
--- a/lib/message_bus/rack/middleware.rb
+++ b/lib/message_bus/rack/middleware.rb
@@ -55,7 +55,7 @@ class MessageBus::Rack::Middleware
   # @param [Rack::Request::Env] env the request environment
   def call(env)
     return @app.call(env) unless env['PATH_INFO'] =~ /^\/message-bus\//
-    
+
     handle_request(env)
   end

GitHub sha: 7241f3ec