[SPARK-12043] wrong comment for "gt" in Column.scala

[gepuro]

comment of "gt" is wrong.

  def gt(other: Any): Column = this > other

  /**
   * Less than.
   * {{{
   *   // Scala: The following selects people younger than 21.
   *   people.select( people("age") < 21 )
   *
   *   // Java:
   *   people.select( people("age").lt(21) );
   * }}}
   *
   * @group expr_ops
   * @since 1.3.0
   */

This is for "lt".

[AmplabJenkins]

Can one of the admins verify this patch?

[srowen]

Uh, you are quoting the wrong javadoc. The javadoc is correct as is -- it precedes, not follows, the method. Please close this PR.