Re: [PATCH v2 2/2] Explicitly `fflush` stdout before expecting interactive input

> From: =?UTF-8?q?=EB=A7=88=EB=88=84=EC=97=98?= <nalla@hamal.uberspace.de>
> 
> At least one interactive command writes a prompt to `stdout` and then
> reads user input on `stdin`: `git clean --interactive`. If the prompt is
> left in the buffer, the user will not realize the program is waiting for
> their input.
> 
> So let's just flush `stdout` before reading the user's input.
> 
> Signed-off-by: 마누엘 <nalla@hamal.uberspace.de>
> Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
> ---
>  prompt.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/prompt.c b/prompt.c
> index 098dcfb7cf9..5ded21a017f 100644
> --- a/prompt.c
> +++ b/prompt.c
> @@ -77,8 +77,10 @@ char *git_prompt(const char *prompt, int flags)
>  
>  int git_read_line_interactively(struct strbuf *line)
>  {
> -	int ret = strbuf_getline_lf(line, stdin);
> +	int ret;
>  
> +	fflush(stdout);
> +	ret = strbuf_getline_lf(line, stdin);
>  	if (ret != EOF)
>  		strbuf_trim_trailing_newline(line);