Suppress warnings: setting Encoding.default_external

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@39210 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_m17n.rb

@@ -195,6 +195,8 @@ class TestM17N < Test::Unit::TestCase
   end
 
   def test_string_inspect_encoding
+    EnvUtil.suppress_warning do
+      begin
         orig_int = Encoding.default_internal
         orig_ext = Encoding.default_external
         Encoding.default_internal = nil
@@ -221,6 +223,8 @@ class TestM17N < Test::Unit::TestCase
         Encoding.default_internal = orig_int
         Encoding.default_external = orig_ext
       end
+    end
+  end
 
   def test_utf_16_32_inspect
     str = "\u3042"
@@ -247,6 +251,8 @@ class TestM17N < Test::Unit::TestCase
   end
 
   def test_object_utf16_32_inspect
+    EnvUtil.suppress_warning do
+      begin
         orig_int = Encoding.default_internal
         orig_ext = Encoding.default_external
         Encoding.default_internal = nil
@@ -260,6 +266,8 @@ class TestM17N < Test::Unit::TestCase
         Encoding.default_internal = orig_int
         Encoding.default_external = orig_ext
       end
+    end
+  end
 
   def test_object_inspect_external
     orig_v, $VERBOSE = $VERBOSE, false