Github user zoltanctoth commented on the issue:
https://github.com/apache/spark/pull/21755
@srowen Just about to submit a new doc relates pull request.
Wondering if your `PS see https://spark.apache.org/contributing.html` line
referred to anything specific about how I should issue
GitHub user zoltanctoth opened a pull request:
https://github.com/apache/spark/pull/21755
Doc fix: The Imputer is an Estimator
Fixing the doc as the imputer is not a `Transformer` but an `Estimator`.
https://github.com/apache/spark/blob/master/mllib/src/main/scala/org
