`.#x` shorthand for private properties

[bbrk24]

This is a compile error:

foo ||> .#x = 1

The . is interpreted as the partial placeholder rather than member access. Without the dot, it is not interpreted in the intended way:

foo ||> #x = 1
// vvv
(this.#x = 1)(foo), foo

[edemaine]

It looks like .#x just generally doesn't work as a private member access helper. Should be an easy fix.