templatekw: change {file_copies} behaviour, add {file_copies_switch}
{file_copies} template now displays file copies with or without the --copies
switch being set. A new {file_copies_switch} template implements the former
behaviour.
adding foo
adding bar
adding baz
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
created new head
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
created new head
% fail with three heads
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
abort: branch 'default' has 3 heads - please merge with an explicit rev
% close one of the heads
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
% succeed with two open heads
1 files updated, 0 files merged, 1 files removed, 0 files unresolved
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
(branch merge, don't forget to commit)