attribute documentation: keep EXAMPLE at end

attribute documentation: keep EXAMPLE at end

The document gives overall definition of states in DESCRIPTION, describes
various aspects of git operations that can be influenced in EFFECTS, and
finally gives examples in the EXAMPLE section.  Archive creation however
was somehow documented after the EXAMPLE section, not insode EFFECTS.

Signed-off-by: Junio C Hamano <gitster@pobox.com>