code: function angleAddr() {
          return wrap('angle-addr', or(
              and(
                  invis(opt(cfws)),
                  literal('<'),
                  addrSpec,
                  literal('>'),
                  invis(opt(cfws))
              ),
              obsAngleAddr
          )());
      }
docs: angle-addr      =   [CFWS] "<" addr-spec ">" [CFWS] / obs-angle-addr