Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Still quite a bit left to do. Per Curtis, if I don't understand something (or presumably it is too time-consuming to precisely determine or ask about), it is left as a TODO, so that he or others can work on it, or myself, to submit in a later pull request.
Some of this is a result of best guesses, and often from inferences about type signatures, Expression.hs comments, online resources (e.g. for huber norm), and so forth. Hopefully some of this will be satisfactory, at least.