* lib/test/unit.rb (assert_include): add alias.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30853 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_notimp.rb

@@ -3,14 +3,14 @@ require 'tmpdir'
 
 class TestNotImplement < Test::Unit::TestCase
   def test_respond_to_fork
-    assert_includes(Process.methods, :fork)
+    assert_include(Process.methods, :fork)
     if /linux/ =~ RUBY_PLATFORM
       assert_equal(true, Process.respond_to?(:fork))
     end
   end
 
   def test_respond_to_lchmod
-    assert_includes(File.methods, :lchmod)
+    assert_include(File.methods, :lchmod)
     if /linux/ =~ RUBY_PLATFORM
       assert_equal(false, File.respond_to?(:lchmod))
     end

test/ruby/test_pack.rb

@@ -139,7 +139,7 @@ class TestPack < Test::Unit::TestCase
 
   def test_integer_endian
     s = [1].pack("s")
-    assert_includes(["\0\1", "\1\0"], s)
+    assert_include(["\0\1", "\1\0"], s)
     if s == "\0\1"
       _integer_big_endian()
     else

test/ruby/test_rand.rb

@@ -357,7 +357,7 @@ END
     end
     v = r.rand(3.1..4)
     assert_instance_of(Float, v, '[ruby-core:24679]')
-    assert_includes(3.1..4, v)
+    assert_include(3.1..4, v)
 
     now = Time.now
     assert_equal(now, r.rand(now..now))