Mention that Zop stops after the shorter list

S03-operators.pod

@@ -14,8 +14,8 @@ Synopsis 3: Perl 6 Operators
 
     Created: 8 Mar 2004
 
-    Last Modified: 29 May 2013
-    Version: 264
+    Last Modified: 20 Jun 2013
+    Version: 265
 
 =head1 Overview
 
@@ -4814,6 +4814,11 @@ In fact, though the C<Z> operators are all list associative
 syntactically, the underlying operator is always applied with its
 own associativity, just as the corresponding reduce operator would do.
 
+The zip operation terminates when either of its lists terminates.
+(Do not use C<Zeq> or C<Z==> to compare two arrays, for instance,
+unless you want to know if one array is a prefix of the other.
+Use C<»eq«> or C<»==«> for that.  Or better, just use C<eqv>.)
+
 Note that, unlike the C<X> operator, all the terms of a C<Z> operator
 may reasonably be infinite lists, since zipping is lazy.