improve shellcheck comments

1985/sicherman/try.sh

@@ -36,8 +36,8 @@ echo 1>&2
 
 # This warning from ShellCheck is incorrect:
 #
-#   SC2094 (info): Make sure not to read and write the same file in the same pipeline.
-#
+#SC2094 (info): Make sure not to read and write the same file in the same pipeline.
+# https://www.shellcheck.net/wiki/SC2094
 # shellcheck disable=SC2094
 ./sicherman < sicherman.c | ./sicherman | diff -s - sicherman.c
 echo "Now explain any differences." 1>&2