This branch of the "if" is only executed if $no_ff is empty, which
only happens if $1 was not '-n'. (This code has been dead since 1d25c8cf82eead72e11287d574ef72d3ebec0db1.)
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Signed-off-by: Junio C Hamano <gitster@pobox.com>