documentation update

R-package/man/xgb.model.dt.tree.Rd

@@ -44,7 +44,8 @@ The content of the \code{data.table} is organised that way:
 \examples{
 data(agaricus.train, package='xgboost')
 
-#Both dataset are list with two items, a sparse matrix and labels (labels = outcome column which will be learned).
+#Both dataset are list with two items, a sparse matrix and labels
+#(labels = outcome column which will be learned).
 #Each column of the sparse Matrix is a feature in one hot encoding format.
 train <- agaricus.train