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Re:Shit – An implementation of Git using POSIX shell by acqq on Thursday February 13, 2020 @03:46PM (#22321266)
> 'printf "$a%s$b" $y', which is also POSIX compliant, shorter

Yes, indeed, thanks for pointing that, it's documented:

"The format operand shall be reused as often as necessary to satisfy the argument operands."

https://pubs.opengroup.org/onlinepubs/9699919799/utilities/p...

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