get a pass in function docstring

R-package/R/xgb.dump.R

@@ -4,8 +4,10 @@
 #' 
 #' @param model the model object.
 #' @param fname the name of the binary file.
-#' @param fmap TODO(tqchen)
-#' 
+#' @param fmap feature map file representing the type of feature, to make it
+#'        look nice, run demo/demo.R for result and demo/featmap.txt for example
+#'        Format: https://github.com/tqchen/xgboost/wiki/Binary-Classification#dump-model
+#'
 #' @examples
 #' data(iris)
 #' bst <- xgboost(as.matrix(iris[,1:4]),as.numeric(iris[,5]), nrounds = 2)