Twitter Card Partial - Description Doesn't Work in Sample Partial Code

The example partial for twitter-card.html here doesn’t allow for support for the description tag referenced above on the page. I was able to add the code below and get it to work, but thought someone may want to update the sample code.

{{ with .description -}}{{- end }}

{{ with .description -}}<meta name="twitter:description" content="{{- . -}}">{{- end }}

Please contact the person running that personal site.