refine an assertion.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@28011 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_process.rb

@@ -1065,7 +1065,9 @@ class TestProcess < Test::Unit::TestCase
       Thread.new { sleep 1; Process.kill(:SIGQUIT, pid) }
       Process.wait(pid)
       s = $?
-      assert_equal(true, s.signaled?, "status.signaled?")
+      assert_equal([false, true, false],
+                   [s.exited?, s.signaled?, s.stopped?],
+                   "[s.exited?, s.signaled?, s.stopped?]")
       assert_send(
         [["#<Process::Status: pid #{ s.pid } SIGQUIT (signal #{ s.termsig })>",
           "#<Process::Status: pid #{ s.pid } SIGQUIT (signal #{ s.termsig }) (core dumped)>"],