The documentation incorrectly states that

% svn copy foo.c bar.c

and

% cp foo.c bar.c
% svn add bar.c

are equivalent. However, the first one keeps foo.c history and the second gets
rid of it.

Fix this and explain the difference.

Reviewed by: brd, allanjude
Approved by: allanjude
Differential Revision: https://reviews.freebsd.org/D12678