Fixed the executable path for erb command

test/erb/test_erb_command.rb

@@ -5,14 +5,14 @@ require 'test/unit'
 class TestErbCommand < Test::Unit::TestCase
   def test_var
     assert_in_out_err(["-w",
-                       File.expand_path("../../../bin/erb", __FILE__),
+                       File.expand_path("../../../libexec/erb", __FILE__),
                        "var=hoge"],
                       "<%=var%>", ["hoge"])
   end
 
   def test_template_file_encoding
     assert_in_out_err(["-w",
-                       File.expand_path("../../../bin/erb", __FILE__)],
+                       File.expand_path("../../../libexec/erb", __FILE__)],
                       "<%=''.encoding.to_s%>", ["UTF-8"])
   end
 
@@ -23,7 +23,7 @@ class TestErbCommand < Test::Unit::TestCase
       /\n.+\/bin\/erb:\d+: warning: Passing safe_level with the 2nd argument of ERB\.new is deprecated\. Do not use it, and specify other arguments as keyword arguments\.\n/,
     ]
     assert_in_out_err(["-w",
-                       File.expand_path("../../../bin/erb", __FILE__),
+                       File.expand_path("../../../libexec/erb", __FILE__),
                        "-S", "0"],
                       "hoge", ["hoge"], warnings)
   end