Edited ch04_keys.adoc with Atlas code editor

ch04_keys.adoc

@@ -1003,7 +1003,7 @@ In 2017, the ((("public key cryptography", "bech32 addresses", "advantages of",
 it prevents transaction
 identifiers (txids) from being changed without the consent of a spending
 user (or a quorum of signers when multiple signatures are required).
-The upgrade, called _segregated witness_ (or _segwit_ for short),  also
+The upgrade, ((("segregated witness (segwit)", id="segwit")))called _segregated witness_ (or _segwit_ for short),  also
 provided additional capacity for transaction data in blocks and several
 other benefits.  However, users wanting direct access to segwit's
 benefits had to accept payments to new output scripts.
@@ -1103,7 +1103,7 @@ image::images/mbc3_0409.png["The same bech32 address QR encoded in lowercase and
   and have that wallet remain able to spend to bech32 addresses for
   users of new features added in future protocol upgrades.  It was
   hoped that we might never again need to go through the system-wide
-  upgrade cycles necessary to allow people to fully use P2SH and((("public key cryptography", "bech32 addresses", "advantages of", startref="pub-key-bech32-adv")))((("bech32 addresses", "advantages of", startref="bech32-adv"))) segwit.
+  upgrade cycles necessary to allow people to fully use P2SH and((("public key cryptography", "bech32 addresses", "advantages of", startref="pub-key-bech32-adv")))((("bech32 addresses", "advantages of", startref="bech32-adv")))((("segregated witness (segwit)", startref="segwit"))) segwit.
 
 ==== Problems with Bech32 Addresses