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

    https://github.com/apache/spark/pull/20618#discussion_r169086090
  
    --- Diff: sql/core/src/main/scala/org/apache/spark/sql/functions.scala ---
    @@ -1313,131 +1313,168 @@ object functions {
       
//////////////////////////////////////////////////////////////////////////////////////////////
     
       /**
    -   * Computes the cosine inverse of the given value; the returned angle is 
in the range
    -   * 0.0 through pi.
    +   * @return angle in radians whose cosine is `e`, as if computed by 
[[java.lang.Math#acos]]
        *
        * @group math_funcs
        * @since 1.4.0
        */
       def acos(e: Column): Column = withExpr { Acos(e.expr) }
     
    +  // scalastyle:off line.size.limit
    --- End diff --
    
    You should be able to just wrap comments rather than disable this?


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