Add additional disclaimer to "diffstat"s.

[pintos-anon] / doc / userprog.texi

diff --git a/doc/userprog.texi b/doc/userprog.texi
index b7d356ff0790b13b639ea1072429decc78e324dc..75123849b0622bcd7aa312a462cba104a36761de 100644 (file)
--- a/doc/userprog.texi
+++ b/doc/userprog.texi
@@ -799,6 +799,12 @@ Here's a summary of our reference solution, produced by the
 @command{diffstat} program.  The final row gives total lines inserted
 and deleted; a changed line counts as both an insertion and a deletion.
 
+The reference solution represents just one possible solution.  Many
+other solutions are also possible and many of those differ greatly from
+the reference solution.  Some excellent solutions may not modify all the
+files modified by the reference solution, and some may modify files not
+modified by the reference solution.
+
 @verbatim
  threads/thread.c     |   13 
  threads/thread.h     |   26 +