gnus-1
gnus-1 is an interactive autoloaded compiled Lisp function in `gnus-start.el
'.
(gnus-1 &optional ARG DONT-CONNECT SLAVE)
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If ARG is non-nil and a positive number, Gnus will use that as the
startup level. If ARG is non-nil and not a positive number, Gnus will
prompt the user for the name of an NNTP server to use.