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@@ -123,3 +123,8 @@ sort: Investigate better sorting algorithms; see Knuth vol. 3.
   algorithm to try next should be merge insertion.  See Knuth section
   5.3.1, who credits Lester Ford, Jr. and Selmer Johnson, American
   Mathematical Monthly 66 (1959), 387-389.
+
+Document the exit status of each and every program.
+  Suggestion from Dan Jacobson.
+  The sentence or two describing the common case must appear just once,
+  and then it must be made to appear in the 70+ places where it's needed.