Home-equity lenders are sprucing up their loan offerings trying to woo back borrowers who are being lured away by the promise of lower interest rates in the conventional mortgage markets. At a glance, it’s hard to say that the HEL market is suffering. According to data compiled by Inside Alternative Mortgages, origination of prime second mortgages – including closed-end HELs and home equity lines of credit – rose by a robust 46.8 percent during…