One might be wondering why 'test' and '[' are separate binaries at all.
This is to give maximum flexibility wrt copying binaries etc.
Note one can build coreutils like busybox as a single binary,
by just `./configure --enable-single-binary` at build time.
This is already available as an option on Fedora at least through
the coreutils-single (1.2MB) package.
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