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 files changed, 2 insertions, 2 deletions

diff --git a/editors/vi.c b/editors/vi.c
index e6527e36b..508477954 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -4092,8 +4092,8 @@ static void do_cmd(int c)
 #endif
                                         }
                                 }
-                        } else /* if (c == '>') */ {
-                                // shift right -- add tab or tabstop spaces
+                        } else if (/* c == '>' && */ p != end_line(p)) {
+                                // shift right -- add tab or tabstop spaces on non-empty lines
                                 char_insert(p, '\t', allow_undo);
                         }
 #if ENABLE_FEATURE_VI_UNDO