This reverts commit ccaaad1.
Make vec::view a method too.
tutorial: changing `again` to `loop`
Destructors were internally declared with an extra (hidden) nil-typed argument that was passed in by-ref mode. This was causing spurious mode warnings. Deleted it. Also some misc. cleanup because I couldn't help myself.
This section associates borrowed pointers purely with stack allocation, which is confusing. The following sections explain pointers in detail.
…ble, and private