The documentation erroneously used the same wording for both fetch and
pull, stating that something will be merged even in git-fetch(1).
In addition, saying that "<ref> is equivalent to <ref>:" doesn't
really help anyone who still needs to read manpages. Clarify what is
actually going on.
Signed-off-by: Thomas Rast <trast@inf.ethz.ch> Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>