Edited ch08_signatures.adoc with Atlas code editor

ch08_signatures.adoc

@@ -324,7 +324,7 @@ In cryptographic operations, some functions may be private (such
   <<schnorr_multisignatures>> and <<schnorr_threshold_signatures>>.
 
 Batch verification::
-  When used in a certain way (which Bitcoin does), one consequence of
+  When used((("batch verification of digital signatures"))) in a certain way (which Bitcoin does), one consequence of
   schnorr's linearity is that it's relatively straightforward to verify
   more than one schnorr signature at the same time in less time than it
   would take to verify each signature independently.  The more