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-rw-r--r--lib/yahns/rackup_handler.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/yahns/rackup_handler.rb b/lib/yahns/rackup_handler.rb
index 3d7beab..a0756bb 100644
--- a/lib/yahns/rackup_handler.rb
+++ b/lib/yahns/rackup_handler.rb
@@ -1,5 +1,6 @@
 # Copyright (C) 2013-2014, all contributors
 # License: GPLv3 or later (https://www.gnu.org/licenses/gpl-3.0.txt)
+# frozen_string_literal: true
 require_relative '../yahns'
 
 module Yahns::RackupHandler # :nodoc:
@@ -38,6 +39,7 @@ module Yahns::RackupHandler # :nodoc:
     Yahns::Server.new(cfg).start.join
   end
 
+  # this is called by Rack::Server
   def self.valid_options
     # these should be the most common options
     {