Fixing search_field to remove object attribute from options hash [#5730 state:resolved]

Signed-off-by: NJosé Valim <jose.valim@gmail.com>

actionpack/lib/action_view/helpers/form_helper.rb

@@ -791,7 +791,7 @@ def search_field(object_name, method, options = {})
           options["incremental"] = true unless options.has_key?("incremental")
         end
 
-        InstanceTag.new(object_name, method, self, options.delete(:object)).to_input_field_tag("search", options)
+        InstanceTag.new(object_name, method, self, options.delete("object")).to_input_field_tag("search", options)
       end
 
       # Returns a text_field of type "tel".