Few Typos before "Into the Weeds"

[vsocrates]

I've noticed a few typos described below:

1. In line 365, the sentence reads "which is the $g$ function described above", but the $g$ function isn't described yet. I believe we want to describe the function P_En->Vn as the gather function.
2. In line 460, I think the conclusion should be, "The first thing to notice is that, surprisingly, a higher number of parameters does not necessarily correlate with higher performance."
3. In line 503, it should be "We wish to highlight two general directions..."

Happy to make pull requests if these changes make sense!