OneHotEncoder __init__ uses dropLast but doc strings all say includeFirst

The OneHotEncoder._init_ doc string in PySpark has an input keyword listed as includeFirst, whereas the code actually uses dropLast.

This especially confusing because the _init_ function accepts only keywords, and following the documentation on the web (https://spark.apache.org/docs/2.0.1/api/python/pyspark.ml.html#pyspark.ml.feature.OneHotEncoder) or of help in Python will result in the error:

TypeError: _init_() got an unexpected keyword argument 'includeFirst'

The error is immediately viewable in the source code:

    @keyword_only
    def __init__(self, dropLast=True, inputCol=None, outputCol=None):
        """
        __init__(self, includeFirst=True, inputCol=None, outputCol=None)
        """