vi: fix refusal to save buffers with single insert/change modification

[frno7]

Starting new change sets on vi_insert = 1 assignments is a provisional fix, because undo history will not be optimal. However, refusing to save modified buffers is a fatal problem for the editor.

A single edit, with insert (or change) only, did not save the buffer:

$ rm -f a && echo -e 'iabcd\eZZ' | ./vi -v a >/dev/null && cat a
cat: a: No such file or directory

However, editing twice, with insert followed by append, works as expected:

$ rm -f a && echo -e 'iab\eacd\eZZ' | ./vi -v a >/dev/null && cat a
abcd

Fixes: ca69c12 ("vi: handle insert mode commands in vi.c")

[aligrudi]

Fredrik Noring ***@***.***> wrote:

Starting new change sets on `vi_insert = 1` assignments is a provisional fix, because undo history will not be optimal. However, refusing to save modified buffers is a fatal problem for the editor. A single edit, with insert (or change) only, did not save the buffer: ```shell $ rm -f a && echo -e "iabcd\eZZ" | ./vi -v a >/dev/null && cat a cat: a: No such file or directory ```

Thanks for the patch. I cannot reproduce it with this command though. I wonder what is different in my setup. Ali