Fix a-vs-an typos

test/functional/rpc_rawtransaction.py

@@ -186,7 +186,7 @@ class RawTransactionsTest(BitcoinTestFramework):
         self.nodes[0].generate(1)
         self.sync_all()
 
-        #THIS IS A INCOMPLETE FEATURE
+        #THIS IS AN INCOMPLETE FEATURE
         #NODE2 HAS TWO OF THREE KEY AND THE FUNDS SHOULD BE SPENDABLE AND COUNT AT BALANCE CALCULATION
         assert_equal(self.nodes[2].getbalance(), bal) #for now, assume the funds of a 2of3 multisig tx are not marked as spendable