Add RM_ReplyWithErrorFormat that can support format (#11923)

* Add RM_ReplyWithErrorFormat that can support format

Reply with the error create from a printf format and arguments.

If the error code is already passed in the string 'fmt', the error
code provided is used, otherwise the string "-ERR " for the generic
error code is automatically added.

The usage is, for example:
    RedisModule_ReplyWithErrorFormat(ctx, "An error: %s", "foo");
    RedisModule_ReplyWithErrorFormat(ctx, "-WRONGTYPE Wrong Type: %s", "foo");

The function always returns REDISMODULE_OK.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/networking.c b/src/networking.c
index 7fa18af48..574773b37 100644
--- a/src/networking.c
+++ b/src/networking.c
@@ -620,9 +620,9 @@ void addReplyErrorSdsSafe(client *c, sds err) {
     addReplyErrorSdsEx(c, err, 0);
 }
 
-/* Internal function used by addReplyErrorFormat and addReplyErrorFormatEx.
+/* Internal function used by addReplyErrorFormat, addReplyErrorFormatEx and RM_ReplyWithErrorFormat.
  * Refer to afterErrorReply for more information about the flags. */
-static void addReplyErrorFormatInternal(client *c, int flags, const char *fmt, va_list ap) {
+void addReplyErrorFormatInternal(client *c, int flags, const char *fmt, va_list ap) {
     va_list cpy;
     va_copy(cpy,ap);
     sds s = sdscatvprintf(sdsempty(),fmt,cpy);