Edited ch06_transactions.adoc with Atlas code editor

ch06_transactions.adoc

@@ -1059,7 +1059,7 @@ transaction in a block unless it satisfies one of the following rules:
   included in the blockchain by setting its lock time to a value of
   500,000,000 or greater.  In this case, the field is parsed as epoch
   time (the number of seconds since 1970-01-01T00:00 UTC) and the
-  transaction can only be included in a block with a _median time past_
+  transaction can only be included in a ((("median time past (MTP)")))block with a _median time past_
   (MTP) greater than the lock time.  MTP is normally about an hour or
   two behind the current time.  The rules for MTP are described in
   <<mtp>>.