doc: add note about function printf_date_tags in function printf (plugin API reference)

doc/en/weechat_plugin_api.en.adoc

@@ -6842,6 +6842,15 @@ Prototype:
 void weechat_printf (struct t_gui_buffer *buffer, const char *message, ...);
 ----
 
+This function is a shortcut for function printf_date_tags. These two calls give
+exactly same result:
+
+[source,C]
+----
+weechat_printf (buffer, "message");
+weechat_printf_date_tags (buffer, 0, NULL, "message");
+----
+
 Arguments:
 
 * _buffer_: buffer pointer, if NULL, message is displayed on WeeChat buffer

doc/fr/weechat_plugin_api.fr.adoc

@@ -6953,6 +6953,15 @@ Prototype :
 void weechat_printf (struct t_gui_buffer *buffer, const char *message, ...);
 ----
 
+Cette fonction est un raccourci vers la fonction printf_date_tags. Ces deux appels
+donnent exactement le même résultat :
+
+[source,C]
+----
+weechat_printf (buffer, "message");
+weechat_printf_date_tags (buffer, 0, NULL, "message");
+----
+
 Paramètres :
 
 * _buffer_ : pointeur vers le tampon, si NULL, le message est affiché sur le

doc/it/weechat_plugin_api.it.adoc

@@ -7013,6 +7013,16 @@ Prototipo:
 void weechat_printf (struct t_gui_buffer *buffer, const char *message, ...);
 ----
 
+// TRANSLATION MISSING
+This function is a shortcut for function printf_date_tags. These two calls give
+exactly same result:
+
+[source,C]
+----
+weechat_printf (buffer, "message");
+weechat_printf_date_tags (buffer, 0, NULL, "message");
+----
+
 Argomenti:
 
 * _buffer_: puntatore al buffer, se NULL il messaggio viene visualizzato sul buffer di WeeChat

doc/ja/weechat_plugin_api.ja.adoc

@@ -6842,6 +6842,16 @@ weechat.prnt("", "Color: %sblue %sdefault color %syellow on red"
 void weechat_printf (struct t_gui_buffer *buffer, const char *message, ...);
 ----
 
+// TRANSLATION MISSING
+This function is a shortcut for function printf_date_tags. These two calls give
+exactly same result:
+
+[source,C]
+----
+weechat_printf (buffer, "message");
+weechat_printf_date_tags (buffer, 0, NULL, "message");
+----
+
 引数:
 
 * _buffer_: バッファへのポインタ、NULL の場合は WeeChat バッファにメッセージを表示