FIX: typo

unittests/test_table_importer.py

@@ -93,7 +93,7 @@ class ConverterTest(unittest.TestCase):
         assert df.a.iloc[0] == df.b.iloc[0] == df.c.iloc[0]
 
     def test_date_xls(self):
-        """Test with .xlsx in order to check xlrd engine."""
+        """Test with .xls in order to check xlrd engine."""
         test_file = os.path.join(os.path.dirname(__file__), "date.xls")
         self.importer = XLSImporter(converters={'a': date_converter,
                                                 'b': date_converter,