for those not seeing the joke: vi in plan 9 is a mips instruction interpreter.
emacs(1) is:

     EMACS(1)                                                 EMACS(1)

     NAME
          emacs - editor macros

     SYNOPSIS
          emacs [ options ]

     DESCRIPTION
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     SOURCE
          MIT

     SEE ALSO
          sam(1), vi(1)

     BUGS
          Yes.