Update docs

Author: yanboliang

R/pkg/R/mllib.R

@@ -754,7 +754,7 @@ setMethod("predict", signature(object = "KMeansModel"),
 #'
 #' # save fitted model to input path
 #' path <- "path/to/model"
-#' write.ml(blr_model, path)
+#' write.ml(model, path)
 #'
 #' # can also read back the saved model and predict
 #' # Note that summary deos not work on loaded model

mllib/src/main/scala/org/apache/spark/ml/r/LogisticRegressionWrapper.scala

@@ -180,4 +180,4 @@ private[r] object LogisticRegressionWrapper
       new LogisticRegressionWrapper(pipeline, features, labels)
     }
   }
-}
+}