Breaks a string at a given marker. Uses <!--more--> by default.
---title: 'Example Entry'---Lorem Ipsum dolor sit amet.<!--more--> consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Massa id neque aliquam vestibulum.{{ books | excerpt }}Lorem Ipsum dolor sit amet.You can override the marker by passing an alternative as the first parameter:
{{ books | excerpt:<!-- end --> }}
