This plugin exists for backward compatibility and is disabled by default.
It gets automatically enabled when {@link PicoDeprecated} is enabled. You
can avoid this by calling {@link PicoExcerpt::setEnabled()}.
This plugin doesn't do its job very well and depends on
{@link PicoParsePagesContent}, what heavily impacts Pico's performance. You
should either use the Description meta header field or write something own.
Best solution seems to be a filter for twig, see e.g.
{@link https://gist.github.com/james2doyle/6629712}.
onSinglePageLoaded()
public méthode
Creates a excerpt for the contents of each page