**Apache Airflow version**: 1.10.11

**Environment**: Python 3.7

- **Cloud provider or hardware configuration**:
- **OS** (e.g. from /etc/os-release): PRETTY_NAME="Debian GNU/Linux 10 (buster)"
 (from python3.7-slim-buster docker image)
- **Kernel** (e.g. `uname -a`): Linux 5.4.0-42-generic #46-Ubuntu SMP Fri Jul 10 00:24:02 UTC 2020 x86_64 GNU/Linux
- **Install tools**:
- **Others**:

**What happened**:

Using a markdown formatted table does not work.

**What you expected to happen**:

To be able to see a formated table within DAG view

**How to reproduce it**:

Add a tabular formatted code do dag.doc_md.

Example:

> mytable:
> 
> | a | b | c |
> | ------------- | ------------- | ------------- |
> | a | b | c |

[Table not formatted](https://i.imgur.com/l6JXuWe.png)

**Anything else we need to know**: N/A

tests/www/test_utils.py
#
#
#
import unittest
from datetime import datetime
from urllib.parse import parse_qs
from bs4 import BeautifulSoup
from parameterized import parameterized
from airflow.www import utils
from airflow.www.utils import wrapped_markdown
from tests.test_utils.config import conf_vars
class TestUtils(unittest.TestCase):
    def test_empty_variable_should_not_be_hidden(self):
        self.assertFalse(utils.should_hide_value_for_key(""))
        self.assertFalse(utils.should_hide_value_for_key(None))
    def test_normal_variable_should_not_be_hidden(self):
        self.assertFalse(utils.should_hide_value_for_key("key"))
    def test_sensitive_variable_should_be_hidden(self):