Use explicit source encoding rather than forced UTF-8 from US-ASCII.

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>

actionmailer/test/old_base/mail_service_test.rb

@@ -866,7 +866,6 @@ EOF
     regex = Regexp.escape('Subject: Foo =?UTF-8?Q?=C3=A1=C3=AB=C3=B4=?= =?UTF-8?Q?_=C3=AE=C3=BC=?=')
     assert_match(/#{regex}/, mail.encoded)
     string = "Foo áëô îü"
-    string.force_encoding('UTF-8') if string.respond_to?(:force_encoding)
     assert_match(string, mail.subject)
   end
 
@@ -875,7 +874,6 @@ EOF
     regex = Regexp.escape('Subject: Foo =?UTF-8?Q?=C3=A1=C3=AB=C3=B4=?= =?UTF-8?Q?_=C3=AE=C3=BC=?=')
     assert_match(/#{regex}/, mail.encoded)
     string = "Foo áëô îü"
-    string.force_encoding('UTF-8') if string.respond_to?(:force_encoding)
     assert_match(string, mail.subject)
   end
 

activesupport/lib/active_support/core_ext/uri.rb

@@ -1,8 +1,9 @@
+# encoding: utf-8
+
 if RUBY_VERSION >= '1.9'
   require 'uri'
 
   str = "\xE6\x97\xA5\xE6\x9C\xAC\xE8\xAA\x9E" # Ni-ho-nn-go in UTF-8, means Japanese.
-  str.force_encoding(Encoding::UTF_8) if str.respond_to?(:force_encoding)
 
   parser = URI::Parser.new
   unless str == parser.unescape(parser.escape(str))

activesupport/test/core_ext/uri_ext_test.rb

@@ -1,3 +1,4 @@
+# encoding: utf-8
 require 'abstract_unit'
 require 'uri'
 require 'active_support/core_ext/uri'
@@ -5,7 +6,6 @@ require 'active_support/core_ext/uri'
 class URIExtTest < Test::Unit::TestCase
   def test_uri_decode_handle_multibyte
     str = "\xE6\x97\xA5\xE6\x9C\xAC\xE8\xAA\x9E" # Ni-ho-nn-go in UTF-8, means Japanese.
-    str.force_encoding(Encoding::UTF_8) if str.respond_to?(:force_encoding)
 
     if URI.const_defined?(:Parser)
       parser = URI::Parser.new

activesupport/test/multibyte_chars_test.rb

@@ -105,7 +105,7 @@ class MultibyteCharsUTF8BehaviourTest < Test::Unit::TestCase
       @whitespace = "\n\t#{[32, 8195].pack('U*')}"
     else
       # Ruby 1.9 only supports basic whitespace
-      @whitespace = "\n\t ".force_encoding(Encoding::UTF_8)
+      @whitespace = "\n\t "
     end
 
     @byte_order_mark = [65279].pack('U')