fix comment length

Author: zeitos

mllib/src/main/scala/org/apache/spark/mllib/recommendation/ALS.scala

@@ -207,9 +207,10 @@ class ALS private (
 
   /**
    * :: DeveloperApi ::
-   * Sets storage level for final RDDs (user/product used in the MatrixFactorizationModel). The default value is
-   * `MEMORY_AND_DISK`. Users can change it to a serialized storage, e.g., `MEMORY_AND_DISK_SER` and
-   * set `spark.rdd.compress` to `true` to reduce the space requirement, at the cost of speed.
+   * Sets storage level for final RDDs (user/product used in MatrixFactorizationModel). The default
+   * value is `MEMORY_AND_DISK`. Users can change it to a serialized storage, e.g. 
+   * `MEMORY_AND_DISK_SER` and set `spark.rdd.compress` to `true` to reduce the space requirement,
+   * at the cost of speed.
    */
   @DeveloperApi
   def setFinalRDDStorageLevel(storageLevel: StorageLevel): this.type = {