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-rw-r--r--ext/psych/lib/psych/json/ruby_events.rb1
-rw-r--r--ext/psych/lib/psych/json/stream.rb1
-rw-r--r--ext/psych/lib/psych/json/tree_builder.rb1
-rw-r--r--ext/psych/lib/psych/json/yaml_events.rb1
4 files changed, 4 insertions, 0 deletions
diff --git a/ext/psych/lib/psych/json/ruby_events.rb b/ext/psych/lib/psych/json/ruby_events.rb
index 6b73249c06..478eb667c7 100644
--- a/ext/psych/lib/psych/json/ruby_events.rb
+++ b/ext/psych/lib/psych/json/ruby_events.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module Psych
module JSON
module RubyEvents # :nodoc:
diff --git a/ext/psych/lib/psych/json/stream.rb b/ext/psych/lib/psych/json/stream.rb
index fe2a6e9116..83b7e13655 100644
--- a/ext/psych/lib/psych/json/stream.rb
+++ b/ext/psych/lib/psych/json/stream.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/json/ruby_events'
require 'psych/json/yaml_events'
diff --git a/ext/psych/lib/psych/json/tree_builder.rb b/ext/psych/lib/psych/json/tree_builder.rb
index b799c93f58..2f94b8c252 100644
--- a/ext/psych/lib/psych/json/tree_builder.rb
+++ b/ext/psych/lib/psych/json/tree_builder.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'psych/json/yaml_events'
module Psych
diff --git a/ext/psych/lib/psych/json/yaml_events.rb b/ext/psych/lib/psych/json/yaml_events.rb
index d054d9b458..07f64737c5 100644
--- a/ext/psych/lib/psych/json/yaml_events.rb
+++ b/ext/psych/lib/psych/json/yaml_events.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module Psych
module JSON
module YAMLEvents # :nodoc: