Fix typos in the draft

[purpleKarrot]

A few issues that I found while reading the paper.

Some others issues that caught my eye, but I wanted to clarify:

Aspect	protocol	proxy (P3086)
Interaction syntax	Value semantics: p.draw()	Pointer semantics: p->draw()

Should this be "Value syntax" and "Pointer syntax"? Or just use the code alone?

asks the vtable to provide a movecopy of the storage

Is "movecopy" a known term?

[jbcoe]

Thanks, the draft has evolved so I've applied these (rather essential!) fixes manually.