Add hint interactive cleaning

For translators, specify that a [y/N] reply is needed.

Also capitalize the first word in the prompt, as all the other
interactive prompts from this command are capitalized.

Signed-off-by: Jean-Noel Avila <jn.avila@free.fr>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/clean.c

@@ -754,7 +754,8 @@ static int ask_each_cmd(void)
 		/* Ctrl-D should stop removing files */
 		if (!eof) {
 			qname = quote_path_relative(item->string, NULL, &buf);
-			printf(_("remove %s? "), qname);
+			/* TRANSLATORS: Make sure to keep [y/N] as is */
+			printf(_("Remove %s [y/N]? "), qname);
 			if (strbuf_getline(&confirm, stdin, '\n') != EOF) {
 				strbuf_trim(&confirm);
 			} else {