Made changes to ch08.asciidoc

ch08.asciidoc

@@ -349,7 +349,7 @@ The first byte, +03+, instructs the script execution engine to push the next thr
 
 The next few hexadecimal digits (+03858402062+) are used to encode an extra _nonce_ (see <<extra_nonce>>), or random value, used to find a suitable Proof-of-Work solution.
 
-The final part of the coinbase data (+2f503253482f+) is the ASCII-encoded string +/P2SH/+, which indicates that the mining node that mined this block supports the Pay-to-Script-Hash (P2SH) improvement defined in BIP0016. The introduction of the P2SH capability required a "vote" by miners to endorse either BIP0016 or BIP0017. Those endorsing the BIP0016 implementation were to include +/P2SH/+ in their coinbase data. Those endorsing the BIP0017 implementation of P2SH were to include the string "p2sh/CHV" in their coinbase data. The BIP0016 was elected as the winner, and many miners continued including the string +/P2SH/+ in their coinbase to indicate support for this feature.
+The final part of the coinbase data (+2f503253482f+) is the ASCII-encoded string +/P2SH/+, which indicates that the mining node that mined this block supports the Pay-to-Script-Hash (P2SH) improvement defined in BIP0016. The introduction of the P2SH capability required a "vote" by miners to endorse either BIP0016 or BIP0017. Those endorsing the BIP0016 implementation were to include +/P2SH/+ in their coinbase data. Those endorsing the BIP0017 implementation of P2SH were to include the string +p2sh/CHV+ in their coinbase data. The BIP0016 was elected as the winner, and many miners continued including the string +/P2SH/+ in their coinbase to indicate support for this feature.
 
 <<satoshi_words>> uses the libbitcoin library introduced in <<alt_libraries>> to extract the coinbase data from the genesis block, displaying Satoshi's message. Note that the libbitcoin library contains a static copy of the genesis block, so the example code can use retrieve the genesis block directly from the library.