feedback on "The First Compiler"

[wilbowma]

• [x] - some examples in check-paren-x64-syntax use check-paren-x64
• [ ] - should probably mention number->string and symbol->string?
  • can use format or ~a instead. Also, want to move Racket-specific stuff into margin-notes when possible, leave text to focus on concepts.
• [ ] - why does sys-exit say it allows windows but doesn't work for windows?
• [ ] isn't "syscall" not a valid instruction? So how is the rts really an instruction sequence?
• [ ] The distinction between wrap-x64-run-time and --boilerplate is not that clear to me
  • This has been a point of confusion for students as well
• [x] why is the result of execute eof? The wrong run/reader is installed need to use nasm-run/exit-code