cli: remove formatting hint correclty when it's not the last element.

I noticed that the 'lightning-cli summary' output was wrong.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

cli/lightning-cli.c

@@ -408,7 +408,7 @@ static enum format delete_format_hint(const char *resp,
 		format = HUMAN;
 
 	/* Don't let hint appear in the output! */
-	json_tok_remove(toks, result, hint, 1);
+	json_tok_remove(toks, result, hint-1, 1);
 	return format;
 }
 

cli/test/run-remove-hint.c

@@ -0,0 +1,114 @@
+#include "config.h"
+#include <assert.h>
+#include <common/amount.h>
+#include <common/bigsize.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int test_main(int argc, char *argv[]);
+ssize_t test_read(int fd, void *buf, size_t len);
+int test_socket(int domain, int type, int protocol);
+int test_connect(int sockfd, const struct sockaddr *addr,
+		 socklen_t addrlen);
+int test_getpid(void);
+int test_printf(const char *format, ...);
+int test_fputc(int c, FILE *stream);
+
+#define main test_main
+#define read test_read
+#define socket test_socket
+#define connect test_connect
+#define getpid test_getpid
+#define printf test_printf
+#define fputc test_fputc
+
+  #include "../lightning-cli.c"
+#undef main
+
+/* AUTOGENERATED MOCKS START */
+/* Generated stub for bigsize_get */
+size_t bigsize_get(const u8 *p UNNEEDED, size_t max UNNEEDED, bigsize_t *val UNNEEDED)
+{ fprintf(stderr, "bigsize_get called!\n"); abort(); }
+/* Generated stub for bigsize_put */
+size_t bigsize_put(u8 buf[BIGSIZE_MAX_LEN] UNNEEDED, bigsize_t v UNNEEDED)
+{ fprintf(stderr, "bigsize_put called!\n"); abort(); }
+/* Generated stub for version_and_exit */
+char *version_and_exit(const void *unused UNNEEDED)
+{ fprintf(stderr, "version_and_exit called!\n"); abort(); }
+/* AUTOGENERATED MOCKS END */
+
+int test_socket(int domain UNUSED, int type UNUSED, int protocol UNUSED)
+{
+	/* We give a real fd, as it writes to it */
+	return open("/dev/null", O_WRONLY);
+}
+
+int test_connect(int sockfd UNUSED, const struct sockaddr *addr UNUSED,
+		 socklen_t addrlen UNUSED)
+{
+	return 0;
+}
+
+int test_getpid(void)
+{
+	return 9999;
+}
+
+static char *response = "{\"id\": \"lightning-cli-9999\", \"jsonrpc\": \"2.0\", \"result\": {\"channels\": [\"\n\", \"├477308sat    OUT/OURS ┼ IN/THEIRS   477308sat┤ SCID           FLAG ALIAS\", \"├──────────────────────┼──────────────────────┤ 580612x1826x0  [__] BLUEIRON-v0.7.2rc1\"], \"my_address\": \"02b78caed0f45120acc48efe867aa506e8ea60f0712a23303178471da0ca2213f5@hdco6sxkbisc7s5t.onion\", \"format-hint\": \"simple\", \"avail_in\": \"0.00477308500btc (USD $54.37)\", \"num_utxos\": 0, \"num_gossipers\": 1, \"channels_flags\": \"P:private O:offline\", \"avail_out\": \"0.00477308500btc (USD $54.37)\", \"utxo_amount\": \"0.00000000btc (USD $0.00)\", \"num_channels\": 1, \"num_connected\": 1}}\n\n";
+static size_t response_off;
+
+ssize_t test_read(int fd UNUSED, void *buf, size_t len)
+{
+	if (len > strlen(response + response_off))
+		len = strlen(response + response_off);
+	memcpy(buf, response + response_off, len);
+	return len;
+}
+
+static char *output;
+
+int test_printf(const char *fmt, ...)
+{
+	va_list ap;
+
+	va_start(ap, fmt);
+	tal_append_vfmt(&output, fmt, ap);
+	va_end(ap);
+	return 1;
+}
+
+int test_fputc(int c, FILE *stream)
+{
+	tal_append_fmt(&output, "%c", c);
+	return (unsigned)c;
+}
+
+int main(int argc UNUSED, char *argv[])
+{
+	setup_locale();
+
+	char *fake_argv[] = { argv[0], "--lightning-dir=/tmp/", "test", NULL };
+
+	output = tal_strdup(NULL, "");
+	assert(test_main(3, fake_argv) == 0);
+
+	assert(streq(output, "channels=\n"
+		     "\n"
+		     "├477308sat    OUT/OURS ┼ IN/THEIRS   477308sat┤ SCID           FLAG ALIAS\n"
+		     "├──────────────────────┼──────────────────────┤ 580612x1826x0  [__] BLUEIRON-v0.7.2rc1\n"
+		     "my_address=02b78caed0f45120acc48efe867aa506e8ea60f0712a23303178471da0ca2213f5@hdco6sxkbisc7s5t.onion\n"
+		     "avail_in=0.00477308500btc (USD $54.37)\n"
+		     "num_utxos=0\n"
+		     "num_gossipers=1\n"
+		     "channels_flags=P:private O:offline\n"
+		     "avail_out=0.00477308500btc (USD $54.37)\n"
+		     "utxo_amount=0.00000000btc (USD $0.00)\n"
+		     "num_channels=1\n"
+		     "num_connected=1\n"));
+	tal_free(output);
+	return 0;
+}