fix syntax error

app/controllers/application_controller.rb

@@ -21,6 +21,13 @@ protected
   def enable_cors
     response.headers["Access-Control-Allow-Origin"] = "*"
   end
+
+  def require_shared_key
+    unless params[:key] == Danbooru.config.shared_remote_key
+      render(text: "forbidden", status: 403)
+      return false
+    end
+  end
   
   def api_check
     if request.format.to_s =~ /\/json|\/xml/ || params[:controller] == "iqdb"

app/controllers/related_tags_controller.rb

@@ -1,5 +1,6 @@
 class RelatedTagsController < ApplicationController
   respond_to :json
+  before_filter :require_shared_key, only: [:update]
 
   def show
     @query = RelatedTagQuery.new(params[:query].to_s.downcase, params[:category])
@@ -11,8 +12,6 @@ class RelatedTagsController < ApplicationController
   end
 
   def update
-    render(text: "forbidden", status: 403) && return false unless params[:key] == Danbooru.config.shared_remote_key
-
     @tag = Tag.find_by_name(params[:name])
     @tag.related_tags = params[:related_tags].scan(/\S+/).in_groups_of(2)
     @tag.related_tags_updated_at = Time.now