[Benchmark] add encoding for CRuby 1.9

test/Benchmark/app/benchmark/string/chomp.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 def string_chomp(x)
   multiple_eol = "The quick brown fox jumps over the lazy dog.\r\n\r\n\n\n\r\n"
   no_eol       = "The quick brown fox jumps over the lazy dog."

test/Benchmark/app/benchmark/string/concat.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 def string_concat(x)
   ascii = "hello"
   utf8  = "こんにちは"

test/Benchmark/app/benchmark/string/dup.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 def string_dup(x)
   ascii = "The quick brown fox jumps over the lazy dog."
   utf8  = "飛べねぇ豚はタダの豚だ...................."

test/Benchmark/app/benchmark/string/equal.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 def string_equal(x)
   string_a = "#{'a' * 1_001}"
   first_char_different = "b#{'a' * 1_000}"

test/Benchmark/app/benchmark/string/include.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 def string_include(x)
   x.report "include? with ASCII match" do
     100000.times do

test/Benchmark/app/benchmark/string/index.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 def string_index(x)
   string = "the"
   string_utf8 = "そして"

test/Benchmark/app/benchmark/string/new.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 def string_new(x)
   ascii = "The quick brown fox jumps over the lazy dog."
   utf8  = "飛べねぇ豚はタダの豚だ...................."

test/Benchmark/app/benchmark/string/slice.rb

@@ -1,3 +1,4 @@
+# -*- coding: utf-8 -*-
 def string_slice(x)
   range = 34..40
   regexp = /[aeiou](.)\1/