Add note to 1989/fubar/README.md

Don't run ouroboros.c directly or it'll get stuck in an infinite loop.

Also moved the author's comments to the first column of the file.

1989/fubar/README.md

@@ -25,6 +25,9 @@ Do you know why?
 With a bit of tinkering Cody Boone Ferguson got this to work on modern systems.
 We thank him for his assistance!
 
+NOTE: don't try running `ouroboros.c` directly with an arg as it'll turn into an
+infinite loop.
+
 ## Author's comments
 
 In a nutshell, this is probably the slowest and most