Kernel.returning is deprecated. Just return url explicitly so it work…

…s on all Rubies and Railses.

lib/gravatar.rb

@@ -68,18 +68,18 @@ def gravatar_url(email, options={})
       email_hash = Digest::MD5.hexdigest(email)
       options = DEFAULT_OPTIONS.merge(options)
       options[:default] = CGI::escape(options[:default]) unless options[:default].nil?
-      returning gravatar_api_url(email_hash, options.delete(:ssl)) do |url|
-        opts = []
-        [:rating, :size, :default].each do |opt|
-          unless options[opt].nil?
-            value = h(options[opt])
-            opts << [opt, value].join('=')
-          end
-        end
-        url << "?#{opts.join('&')}" unless opts.empty?
+      url = gravatar_api_url(email_hash, options.delete(:ssl))
+      opts = []
+      [:rating, :size, :default].each do |opt|
+	unless options[opt].nil?
+	  value = h(options[opt])
+	  opts << [opt, value].join('=')
+	end
       end
+      url << "?#{opts.join('&')}" unless opts.empty?
+      url
     end
 
   end
 
-end
+end