14 files changed, 30 insertions, 30 deletions
diff --git a/ext/date/extconf.rb b/ext/date/extconf.rb
index e8596952de..a4f243ee10 100644
--- a/ext/date/extconf.rb
+++ b/ext/date/extconf.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'mkmf'
 config_string("strict_warnflags") {|w| $warnflags += " #{w}"}
 create_makefile('date_core')
diff --git a/ext/date/lib/date.rb b/ext/date/lib/date.rb
index c10441e573..9170a99ae9 100644
--- a/ext/date/lib/date.rb
+++ b/ext/date/lib/date.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 # date.rb: Written by Tadayoshi Funaba 1998-2011
 
 require 'date_core'
diff --git a/test/date/test_date.rb b/test/date/test_date.rb
index 247cce1eaf..531495d87e 100644
--- a/test/date/test_date.rb
+++ b/test/date/test_date.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_arith.rb b/test/date/test_date_arith.rb
index f5ac5bf30b..96622ba065 100644
--- a/test/date/test_date_arith.rb
+++ b/test/date/test_date_arith.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_attr.rb b/test/date/test_date_attr.rb
index 3d1b0a2e6e..d3bb9b9d74 100644
--- a/test/date/test_date_attr.rb
+++ b/test/date/test_date_attr.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_base.rb b/test/date/test_date_base.rb
index 06fec19e52..8d53adfc8e 100644
--- a/test/date/test_date_base.rb
+++ b/test/date/test_date_base.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_compat.rb b/test/date/test_date_compat.rb
index 1bd30b5f80..316f8c0298 100644
--- a/test/date/test_date_compat.rb
+++ b/test/date/test_date_compat.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_conv.rb b/test/date/test_date_conv.rb
index 3729476314..5c295daba6 100644
--- a/test/date/test_date_conv.rb
+++ b/test/date/test_date_conv.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_marshal.rb b/test/date/test_date_marshal.rb
index 27ae1e9004..10e396b71b 100644
--- a/test/date/test_date_marshal.rb
+++ b/test/date/test_date_marshal.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_new.rb b/test/date/test_date_new.rb
index 80ecbc204e..2a015bf364 100644
--- a/test/date/test_date_new.rb
+++ b/test/date/test_date_new.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_parse.rb b/test/date/test_date_parse.rb
index d980674591..ac0eb85ca7 100644
--- a/test/date/test_date_parse.rb
+++ b/test/date/test_date_parse.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_strftime.rb b/test/date/test_date_strftime.rb
index 1c0f9b11b4..a33eaa340f 100644
--- a/test/date/test_date_strftime.rb
+++ b/test/date/test_date_strftime.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_date_strptime.rb b/test/date/test_date_strptime.rb
index 15fdc949f5..bf3002a24a 100644
--- a/test/date/test_date_strptime.rb
+++ b/test/date/test_date_strptime.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
diff --git a/test/date/test_switch_hitter.rb b/test/date/test_switch_hitter.rb
index 931d736edf..bfd0b8efa5 100644
--- a/test/date/test_switch_hitter.rb
+++ b/test/date/test_switch_hitter.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'test/unit'
 require 'date'
 
@@ -577,29 +577,29 @@ class TestSH < Test::Unit::TestCase
   def test_taint
     h = Date._strptime('15:43+09:00', '%R%z')
     assert_equal(false, h[:zone].tainted?)
-    h = Date._strptime('15:43+09:00'.taint, '%R%z')
+    h = Date._strptime('15:43+09:00'.dup.taint, '%R%z')
     assert_equal(true, h[:zone].tainted?)
 
     h = Date._strptime('1;1/0', '%d')
     assert_equal(false, h[:leftover].tainted?)
-    h = Date._strptime('1;1/0'.taint, '%d')
+    h = Date._strptime('1;1/0'.dup.taint, '%d')
     assert_equal(true, h[:leftover].tainted?)
 
     h = Date._parse('15:43+09:00')
     assert_equal(false, h[:zone].tainted?)
-    h = Date._parse('15:43+09:00'.taint)
+    h = Date._parse('15:43+09:00'.dup.taint)
     assert_equal(true, h[:zone].tainted?)
 
     s = Date.today.strftime('new 105')
     assert_equal(false, s.tainted?)
-    s = Date.today.strftime('new 105'.taint)
+    s = Date.today.strftime('new 105'.dup.taint)
     assert_equal(true, s.tainted?)
-    s = Date.today.strftime("new \000 105".taint)
+    s = Date.today.strftime("new \000 105".dup.taint)
     assert_equal(true, s.tainted?)
 
     s = DateTime.now.strftime('super $record')
     assert_equal(false, s.tainted?)
-    s = DateTime.now.strftime('super $record'.taint)
+    s = DateTime.now.strftime('super $record'.dup.taint)
     assert_equal(true, s.tainted?)
   end
 
@@ -617,29 +617,29 @@ class TestSH < Test::Unit::TestCase
       assert_equal(Encoding::US_ASCII, s.encoding) if s
     end
 
-    h = Date._strptime('15:43+09:00'.force_encoding('euc-jp'), '%R%z')
+    h = Date._strptime('15:43+09:00'.dup.force_encoding('euc-jp'), '%R%z')
     assert_equal(Encoding::EUC_JP, h[:zone].encoding)
-    h = Date._strptime('15:43+09:00'.force_encoding('ascii-8bit'), '%R%z')
+    h = Date._strptime('15:43+09:00'.dup.force_encoding('ascii-8bit'), '%R%z')
     assert_equal(Encoding::ASCII_8BIT, h[:zone].encoding)
 
-    h = Date._strptime('1;1/0'.force_encoding('euc-jp'), '%d')
+    h = Date._strptime('1;1/0'.dup.force_encoding('euc-jp'), '%d')
     assert_equal(Encoding::EUC_JP, h[:leftover].encoding)
-    h = Date._strptime('1;1/0'.force_encoding('ascii-8bit'), '%d')
+    h = Date._strptime('1;1/0'.dup.force_encoding('ascii-8bit'), '%d')
     assert_equal(Encoding::ASCII_8BIT, h[:leftover].encoding)
 
-    h = Date._parse('15:43+09:00'.force_encoding('euc-jp'))
+    h = Date._parse('15:43+09:00'.dup.force_encoding('euc-jp'))
     assert_equal(Encoding::EUC_JP, h[:zone].encoding)
-    h = Date._parse('15:43+09:00'.force_encoding('ascii-8bit'))
+    h = Date._parse('15:43+09:00'.dup.force_encoding('ascii-8bit'))
     assert_equal(Encoding::ASCII_8BIT, h[:zone].encoding)
 
-    s = Date.today.strftime('new 105'.force_encoding('euc-jp'))
+    s = Date.today.strftime('new 105'.dup.force_encoding('euc-jp'))
     assert_equal(Encoding::EUC_JP, s.encoding)
-    s = Date.today.strftime('new 105'.force_encoding('ascii-8bit'))
+    s = Date.today.strftime('new 105'.dup.force_encoding('ascii-8bit'))
     assert_equal(Encoding::ASCII_8BIT, s.encoding)
 
-    s = DateTime.now.strftime('super $record'.force_encoding('euc-jp'))
+    s = DateTime.now.strftime('super $record'.dup.force_encoding('euc-jp'))
     assert_equal(Encoding::EUC_JP, s.encoding)
-    s = DateTime.now.strftime('super $record'.force_encoding('ascii-8bit'))
+    s = DateTime.now.strftime('super $record'.dup.force_encoding('ascii-8bit'))
     assert_equal(Encoding::ASCII_8BIT, s.encoding)
   end