add -p (built-in): do not color the progress indicator separately

The Perl version of this command colors the progress indicator and the
prompt message in one go.

Let's do the same in the built-in version so that the same upcoming test
(which will compare the output of `git add -p` against a known-good
version) will pass both for the Perl version as well as for the built-in
version.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

add-patch.c

@@ -1461,15 +1461,15 @@ static int patch_update_file(struct add_p_state *s,
 		else
 			prompt_mode_type = PROMPT_HUNK;
 
-		color_fprintf(stdout, s->s.prompt_color,
-			      "(%"PRIuMAX"/%"PRIuMAX") ",
+		printf("%s(%"PRIuMAX"/%"PRIuMAX") ", s->s.prompt_color,
 			      (uintmax_t)hunk_index + 1,
 			      (uintmax_t)(file_diff->hunk_nr
 						? file_diff->hunk_nr
 						: 1));
-		color_fprintf(stdout, s->s.prompt_color,
-			      _(s->mode->prompt_mode[prompt_mode_type]),
-			      s->buf.buf);
+		printf(_(s->mode->prompt_mode[prompt_mode_type]),
+		       s->buf.buf);
+		if (*s->s.reset_color)
+			fputs(s->s.reset_color, stdout);
 		fflush(stdout);
 		if (read_single_character(s) == EOF)
 			break;