Minor update to 1985/sicherman/try scripts

It suggests the user figure out any differences in the last command
(this was previously done in the README.md file).

1985/sicherman/try.alt.sh

@@ -34,3 +34,4 @@ echo 1>&2
 read -r -n 1 -p "Press any key to run: ./sicherman.alt < sicherman.alt.c | ./sicherman.alt | diff -s - sicherman.alt.c: "
 echo 1>&2
 ./sicherman.alt < sicherman.alt.c | ./sicherman.alt | diff -s - sicherman.alt.c
+echo "Now explain any differences." 1>&2

1985/sicherman/try.sh

@@ -34,3 +34,4 @@ echo 1>&2
 read -r -n 1 -p "Press any key to run: ./sicherman < sicherman.c | ./sicherman | diff -s - sicherman.c: "
 echo 1>&2
 ./sicherman < sicherman.c | ./sicherman | diff -s - sicherman.c
+echo "Now explain any differences." 1>&2