Environment

• Pythonnet version: 2.3.0
• Python version: 2.7
• Operating System: Windows 10

Details

I have a C# class library which I use in Python. I have a Point class (a code snippet):

public Point(double x, double y)
{
	this.x = x;
	this.y = y;
}

public override string ToString()
{
	return $"Point({x}, {y})";
}

This is to track implementation of the ML-Features: https://spark.apache.org/docs/latest/ml-features

Bucketizer has been implemented in dotnet/spark#378 but there are more features that should be implemented.

• Feature Extractors
  • TF-IDF
  • Word2Vec (dotnet/spark#491)
  • CountVectorizer (https://github.com/dotnet/spark/p

I just noticed this while testing the other PR:

most tests have a clickable got-to-source link, but some don't.

I can't see any difference between the ones that do, and the ones that don't.

![image](https://cloud.githubusercontent.com/assets/4236651/23482266/bca24d48-fece-11e6-9