Github user marmbrus commented on a diff in the pull request:

    https://github.com/apache/spark/pull/6531#discussion_r32281857
  
    --- Diff: 
sql/core/src/main/scala/org/apache/spark/sql/DataFrameStatFunctions.scala ---
    @@ -85,6 +105,13 @@ final class DataFrameStatFunctions private[sql](df: 
DataFrame) {
        *             of the DataFrame.
        * @return A DataFrame containing for the contingency table.
        *
    +   * {{{
    +   *    val df = sqlContext.createDataFrame(Seq((1, 1), (1, 2), (2, 1), 
(2, 1), (2, 3), (3, 2),
    +   *      (3, 3))).toDF(“key”, “value”)
    --- End diff --
    
    You have some UTF-8 sneaking in here which causes it to render weirdly:
    
    ![screen shot 2015-06-11 at 5 14 54 
pm](https://cloud.githubusercontent.com/assets/527/8121227/9095bce6-105d-11e5-87b0-05607647a349.png)



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