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variable) who will use it to create the new window. The above example would
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start the @code{emacs} editor (editing @file{prog.c}) and switch to its window.
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will be written to this file for each window, and removed when the
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window is closed. This is useful for working with @code{talk},
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@code{script}, @code{shutdown}, @code{rsend}, @code{sccs} and other