anchor.diff:  * p. 49, *4.3 Beasley-Springer-Moro*, _Over_, the second listing
     should multiply by .1:
   +
  +[source, q]
   ----
   q)0 (.9)\.1*til 5
   0 0.1 0.29 0.561 0.9049
  
positive.code: * p. 209, *15.1 Partitioning By Column*, _The +sym+ File_, The second
    listing should begin with the following command:
  +
  ----
  q)prices`id
  ----
  
negative.code: * p. 184, *14.2 Pivot Tables*, _Writing a Pivot Function_, The
    implementation of +.util.pivot+ should read:
  +
  [source, q]
  ----
  pivot:{[t]
   u:`$string asc distinct last f:flip key t;
  