In grid dashboard view, the arguments to the `showDialog` call aren't escaped

[brianquinlan]

<td class="pairwise-check_warning" onclick="showDialog(
    '8-3', 'pairwise-check_warning', '', '','CHECK_WARNING', '', '', 'DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. google-cloud-bigtable 0.33.0 has requirement grpc-google-iam-v1<0.12dev,>=0.11.4, but you have grpc-google-iam-v1 0.12.3. ')">
    <div id="8-3" class="dialog" title="google-cloud-bigtable and google-cloud-asset">
    </div>
</td>