Tutorial: "Debugging: Bias and Variance" also "left to be written"?

[ypeels]

http://ufldl.stanford.edu/tutorial/supervised/DebuggingBiasAndVariance/

I was expecting a discussion of learning curves like in the Coursera course on Machine Learning. Is this also "left to be written", like the Optimizers and Objectives subsection?

[ypeels]

Also, there is a grammatical error at the beginning of sentence 3: "the our accuracy [sic]"