vi: don't right shift empty lines

The right shift command ('>') shouldn't affect empty lines.

function                                             old     new   delta
do_cmd                                              4860    4894     +34
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 34/0)               Total: 34 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
1 file changed