Jeff King <p...@peff.net> writes:

>   - replace eval formatting magic with "%s" printf formatters (safer and
>     gets rid of quoting issues in the callers).

This one actually made me think twice about safety, as we'd be using
end-user supplied formatting string without any inspection.  I think
it is fine as it is merely a test helper.  

If somebody is later making it into a test-tool function, I expect
that our interpolation engine, not the bare sprintf(), would be used
there, and it would hopefully also be safe?

Thanks.

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