Add newline to end of files

Author: ali-behjati

src/instruction.rs

@@ -108,4 +108,4 @@ pub fn price_not_stale(price_account_data: Vec<u8>) -> Instruction {
       .try_to_vec()
       .unwrap(),
   }
-}
+}

tests/stale_price.rs

@@ -91,4 +91,4 @@ async fn test_price_stale() {
     price.agg.status = PriceStatus::Trading;
     price.agg.pub_slot = 100; // It will cause an overflow because this is bigger than Solana slot which is impossible in reality
     test_instr(instruction::price_not_stale(bytes_of(&price).to_vec())).await.unwrap_err();
-}
+}