doc: GetTransaction()/getrawtransaction follow-ups to #22383

Author: jnewbery

src/node/transaction.cpp

@@ -121,6 +121,9 @@ CTransactionRef GetTransaction(const CBlockIndex* const block_index, const CTxMe
         uint256 block_hash;
         if (g_txindex->FindTx(hash, block_hash, tx)) {
             if (!block_index || block_index->GetBlockHash() == block_hash) {
+                // Don't return the transaction if the provided block hash doesn't match.
+                // The case where a transaction appears in multiple blocks (e.g. reorgs or
+                // BIP30) is handled by the block lookup below.
                 hashBlock = block_hash;
                 return tx;
             }

src/rpc/rawtransaction.cpp

@@ -76,8 +76,8 @@ static RPCHelpMan getrawtransaction()
 
                 "\nBy default, this call only returns a transaction if it is in the mempool. If -txindex is enabled\n"
                 "and no blockhash argument is passed, it will return the transaction if it is in the mempool or any block.\n"
-                "If -txindex is not enabled and a blockhash argument is passed, it will return the transaction if\n"
-                "the specified block is available and the transaction is found in that block.\n"
+                "If a blockhash argument is passed, it will return the transaction if\n"
+                "the specified block is available and the transaction is in that block.\n"
                 "\nHint: Use gettransaction for wallet transactions.\n"
 
                 "\nIf verbose is 'true', returns an Object with information about 'txid'.\n"