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Switch backticks to double backticks for rst compatibility
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@@ -10,9 +10,9 @@ isatty [FILE DESCRIPTOR]
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Description
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------------
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`isatty` tests if a file descriptor is a tty.
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``isatty`` tests if a file descriptor is a tty.
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`FILE DESCRIPTOR` may be either the number of a file descriptor, or one of the strings `stdin`, `stdout`, or `stderr`.
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``FILE DESCRIPTOR`` may be either the number of a file descriptor, or one of the strings ``stdin``, ``stdout``, or ``stderr``.
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If the specified file descriptor is a tty, the exit status of the command is zero. Otherwise, the exit status is non-zero. No messages are printed to standard error.
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