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File::pushd does a temporary chdir that is easily and automatically
reverted. It works by creating a simple object that caches the original
working directory. When the object is destroyed, the destructor calls
chdir to revert to the original working directory. By storing the
object in a lexical variable with a limited scope, this happens
automatically at the end of the scope.
WWW: https://metacpan.org/release/File-pushd
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