From 56d545e278577b3cfb3f71905a54f85cd2fba16c Mon Sep 17 00:00:00 2001
From: SHIBATA Hiroshi <hsbt@ruby-lang.org>
Date: Mon, 19 Jun 2017 18:34:56 +0900
Subject: make frozen_string_literal: true

---
 lib/psych/visitors/yaml_tree.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'lib/psych/visitors/yaml_tree.rb')

diff --git a/lib/psych/visitors/yaml_tree.rb b/lib/psych/visitors/yaml_tree.rb
index e197a30..671bf5d 100644
--- a/lib/psych/visitors/yaml_tree.rb
+++ b/lib/psych/visitors/yaml_tree.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'psych/tree_builder'
 require 'psych/scalar_scanner'
 require 'psych/class_loader'
@@ -321,7 +321,7 @@ module Psych
           end
           @emitter.scalar o, nil, tag, plain, quote, style
         else
-          maptag = '!ruby/string'
+          maptag = '!ruby/string'.dup
           maptag << ":#{o.class}" unless o.class == ::String
 
           register o, @emitter.start_mapping(nil, maptag, false, Nodes::Mapping::BLOCK)
-- 
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