From the article: "It remains possible to put arbitrary bytes AFTER the parts of the shell script that get parsed & executed (like some Solaris patch files do). "

If you don't know anything about OpenBSD, here's a fun thing:

1. Randomly choose "yes" or "no" to this question.

2. Read the post and get the answer.

3. Repeat until you begin to get a tingly "Spidey sense" that overrides your random-choice.

My Spidey sense here was, "Yes, because OpenBSD would have already thought about and covered that use-case." And indeed, toward the end of the post, that contingency is covered and documented.

Note: if you try this at your job and sense that the company will almost always choose the worst option, you should probably leave that job.

Are you talking about Shar?

https://en.wikipedia.org/wiki/Shar_(file_format)

They were generally uuencoded or similar