Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/15487
@hvanhovell @lins05 I just have a confirmation for the documentation format
and will proceed to sweep it
([SPARK-17963](https://issues.apache.org/jira/browse/SPARK-17963)). So, maybe
you could do as below:
```scala
@ExpressionDescription(
usage =
"""
_FUNC_() - Returns a random column with i.i.d. uniformly distributed
values in [0, 1].
seed is given randomly.
_FUNC_(seed) - Returns a random column with i.i.d. uniformly
distributed values in [0, 1].
seed should be an integer/long/NULL literal.
""",
extended = "...")
```
In the PR I am going to submit, I will exclude both functions, `first` and
`last` and `ran` which would be handled in
https://github.com/apache/spark/pull/15432
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