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- #elvdoc:fn exec
- #
- # ```elvish
- # exec $command? $args...
- # ```
- #
- # Replace the Elvish process with an external `$command`, defaulting to
- # `elvish`, passing the given arguments. This decrements `$E:SHLVL` before
- # starting the new process.
- #
- # This command always raises an exception on Windows with the message "not
- # supported on Windows".
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