Doc: Update isStandardTx comment

src/policy/policy.cpp

@@ -73,12 +73,12 @@ bool IsStandardTx(const CTransaction& tx, std::string& reason)
     BOOST_FOREACH(const CTxIn& txin, tx.vin)
     {
         // Biggest 'standard' txin is a 15-of-15 P2SH multisig with compressed
-        // keys. (remember the 520 byte limit on redeemScript size) That works
+        // keys (remember the 520 byte limit on redeemScript size). That works
         // out to a (15*(33+1))+3=513 byte redeemScript, 513+1+15*(73+1)+3=1627
         // bytes of scriptSig, which we round off to 1650 bytes for some minor
         // future-proofing. That's also enough to spend a 20-of-20
         // CHECKMULTISIG scriptPubKey, though such a scriptPubKey is not
-        // considered standard)
+        // considered standard.
         if (txin.scriptSig.size() > 1650) {
             reason = "scriptsig-size";
             return false;