SAN BENITO — Freddy Fender Lane filled with song Saturday as a crowd seated in folding chairs or standing, with some swaying to the beat of music, joined Margarita Huerta Fender and her brother Isidro Huerta as they sang “Before the Next Teardrop Falls,” famously recorded by their uncle Baldemar Garza Huerta, the singer better known as Freddy Fender.