fix: properly capture empty lines

examples/sample/validators/swap.ak

@@ -1,10 +1,17 @@
 use sample
 
+// Stuff
+
+/// Spend validator
 pub fn spend(datum: sample.Datum, rdmr: sample.Redeemer, _ctx: Nil) -> Bool {
   let x = #(datum, rdmr, #[244])
+
   let y = [#(#[222], #[222]), #(#[233], #[52])]
+
   let [z, f, ..g] = y
+
   let #(a, b, _) = x
+
   z == #(#[222], #[222])
 }