Update test/csv/csv-filter/test_csv_filter.rb

Co-authored-by: Sutou Kouhei <kou@cozmixng.org>

Author: BurdetteLamar

test/csv/csv-filter/test_csv_filter.rb

@@ -75,8 +75,8 @@ def test_no_options
 
   def test_option_h
     output, error = results_for_cli_option("-h")
-    assert_equal("Usage: csv-filter [options]\n", output.lines.first)
-    assert_equal("", error)
+    assert_equal(["Usage: csv-filter [options]\n", ""],
+                            [output.lines.first, error])
   end
 
   def test_option_v