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I think it was just a mistake, or a mental shortcut for:

"If the full path is used and the [binary or script reimplementing said] built-in has been relocated"



Built-ins don't call a separate binary or script - they are literally implemented as a part of the shell. That is, if you look at the shell source code, you will see functions that implement the built-ins. As I pointed out elsewhere, I think they mistakenly said "built-ins."


That's why I said "reimplementing" not "implementing": "/bin/true" script and "true" built-in being examples.


Yeah, that wasn't clear to me on my first reading, which is why I think it's better to phrase it similar to how I did above.




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