hscale=1.2;
text.wrap=yes;
numbering=yes;
a->b: Whole label is link 
    [url="http://abc.com"];
a->b: One \L(http://abc.com)word\L() is link;
a->b: "One \L(http://abc.com/#x)word\L() is link";
a->b: \L(\ref note)At the beginning\L() only;
a->b: \|\L(\ref note)At the beginning\L(), but
      not the number;
a->b: Different \L(target)style\L() of link
    [text.link_format="\c(red)\I"];