vi: fix replacement of single character with CR

Currently if the 'r' command is followed by a carriage return a
literal CR replaces the current character.

Fix this so that:

- a new line is inserted
- the autoindent setting is respected
- the cursor is placed at the start of the new line

function                                             old     new   delta
do_cmd                                              5052    5060      +8
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 8/0)                 Total: 8 bytes

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

1 files changed, 3 insertions, 8 deletions

diff --git a/editors/vi.c b/editors/vi.c
index c6adeb311..899fcf57e 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -4189,14 +4189,9 @@ static void do_cmd(int c)
         case 'r':                       // r- replace the current char with user input
                 c1 = get_one_char();    // get the replacement char
                 if (*dot != '\n') {
-#if ENABLE_FEATURE_VI_UNDO
-                        undo_push(dot, 1, UNDO_DEL);
-                        *dot = c1;
-                        undo_push(dot, 1, UNDO_INS_CHAIN);
-#else
-                        *dot = c1;
-                        modified_count++;
-#endif
+                        dot = text_hole_delete(dot, dot, ALLOW_UNDO);
+                        dot = char_insert(dot, c1, ALLOW_UNDO_CHAIN);
+                        dot_left();
                 }
                 end_cmd_q();    // stop adding to q
                 break;