A & B. The history of the <blink> tag.A & B. The history of the <blink> tag.A & B. The history of the <blink> tag. And a <a href="http://www.example.com/">link</a>.
History of the <blink> tag
A & B. The history of the <blink> tag.
This one is actually invalid in Atom 1.0.summary with type=text/plain. This is not valid in Atom 1.0, where type must be one of text|html|xhtml.
So libsyndication does not parse it for now. If this becomes a problem with real-world feeds,
we might parse less strict in future.
RXhhbXBsZSA8Yj5BdG9tPC9iPg==
Invalid. base64-encoded summary with type=application/octet-stream. Types other than text,
html, xhtml are invalid in Atom 1.0.