test_file.rb: just skip assertion

* test/ruby/test_file.rb (TestFile#test_stat): skip an assertion
  only, not making the entire test skipped

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@49660 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

test/ruby/test_file.rb

@@ -334,8 +334,10 @@ class TestFile < Test::Unit::TestCase
       if stat.birthtime != stat.ctime
         assert_in_delta t0+4, stat.ctime.to_f, delta
       end
-      skip "Windows delays updating atime" if /mswin|mingw/ =~ RUBY_PLATFORM
-      assert_in_delta t0+6, stat.atime.to_f, delta
+      unless /mswin|mingw/ =~ RUBY_PLATFORM
+        # Windows delays updating atime
+        assert_in_delta t0+6, stat.atime.to_f, delta
+      end
     }
   rescue NotImplementedError
   end