fix formatting issues

Author: jrakibi

decoding/inputs-prev-txid.mdx

@@ -138,10 +138,7 @@ The TXID is created differently depending on the transaction type:
 This difference in segwit transactions was intentionally designed to prevent transaction malleability, as signatures are no longer part of the TXID calculation.
 
 <ExpandableAlert title="Historical Note" type="info">
-    There was a unique situation in Bitcoin's history where duplicate TXIDs
-    occurred in blocks 91,722 and 91,880. This led to: • BIP 30: Preventing
-    blocks from containing duplicate TXIDs • BIP 34: Requiring coinbase
-    transactions to include block height in their data
+    There was a unique situation in Bitcoin's history where duplicate TXIDs occurred in blocks 91,722 and 91,880. As a result, BIP 30 was implemented to prevent blocks from containing duplicate TXIDs, and BIP 34 was introduced to require coinbase transactions to include block height in their data.
 </ExpandableAlert>
 
 ## Implementation Details