Oh, I understand now. Yes, that is strange.

It’s showing that it was cross posted. It may have just taken a few minutes.

https://github.com/manish-old/ebooks-2/blob/master/O’Reilly - sed _ awk 2nd Edition.pdf

https://github.com/pengbo-learn/books/blob/master/Mastering Regular Expressions 3rd (Friedl-2006).pdf

https://web.eng.hawaii.edu/Tutor/vi.html maybe?

This is how my friend fixed her check engine light. Just put the official Car Talk electrical tape over it and problem solved.