Github user kiszk commented on the issue:
https://github.com/apache/spark/pull/22069
Do we need to update the following similar examples, too?
Column.scala
```
* {{{
* // Example: encoding gender string column into integer.
*
* // Scala:
* people.select(when(people("gender") === "male", 0)
* .when(people("gender") === "female", 1)
* .otherwise(2))
*
* // Java:
* people.select(when(col("gender").equalTo("male"), 0)
* .when(col("gender").equalTo("female"), 1)
* .otherwise(2))
* }}}
```
functions.scala
```
* {{{
* // Example: encoding gender string column into integer.
*
* // Scala:
* people.select(when(people("gender") === "male", 0)
* .when(people("gender") === "female", 1)
* .otherwise(2))
*
* // Java:
* people.select(when(col("gender").equalTo("male"), 0)
* .when(col("gender").equalTo("female"), 1)
* .otherwise(2))
* }}}
```
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