pub fn split_explicit_title(entry: &str) -> Option<(&str, &str)>Expand description
Split Some Title <target> into its two halves, as Sphinx’s
explicit_title_re (^(.+?)\s*<(.*?)>$, util/nodes.py) does: the
first < that leaves a non-empty title wins, and the line must end
with >. A bare <foo> is therefore a literal target named <foo>,
not an empty-titled reference.