Merge bitcoin/bitcoin#21787: test: fix off-by-ones in rpc_fundrawtransaction assertions

f09e6b2 test: fix off-by-ones in rpc_fundrawtransaction (Jon Atack)

Pull request description:

  The variables in these assertions should be the same within each line.

ACKs for top commit:
  laanwj:
    ACK f09e6b2
  theStack:
    ACK f09e6b2

Tree-SHA512: 7ac754eaadd8cb00a725afa55bccbb8de7547dedac9350d79a9a470918245617e075c56a91adc36fb653bbe8a0a325d59b00443155a7e1a81ebf22e4e4cf56d9

Author: laanwj

test/functional/rpc_fundrawtransaction.py

@@ -728,10 +728,10 @@ def test_option_feerate(self):
         result6 = self.nodes[3].fundrawtransaction(rawtx, {"feeRate": 0})
 
         result_fee_rate = result['fee'] * 1000 / count_bytes(result['hex'])
-        assert_fee_amount(result1['fee'], count_bytes(result2['hex']), 2 * result_fee_rate)
+        assert_fee_amount(result1['fee'], count_bytes(result1['hex']), 2 * result_fee_rate)
         assert_fee_amount(result2['fee'], count_bytes(result2['hex']), 2 * result_fee_rate)
         assert_fee_amount(result3['fee'], count_bytes(result3['hex']), 10 * result_fee_rate)
-        assert_fee_amount(result4['fee'], count_bytes(result3['hex']), 10 * result_fee_rate)
+        assert_fee_amount(result4['fee'], count_bytes(result4['hex']), 10 * result_fee_rate)
         assert_fee_amount(result5['fee'], count_bytes(result5['hex']), 0)
         assert_fee_amount(result6['fee'], count_bytes(result6['hex']), 0)