Spec should allow arbitrary parentheses around expressions (section 4).

[cscott]

In the general syntax rules, the spec should mention that arbitrary parentheses should be permitted. That is, if the syntax rule in the spec says:

x:Identifier = +x:Identifier;
it is intended that the following all match this rule:
x = +x;
x = +(x);
x = +((((x))));

[cscott]

You should also be clear whether parentheses are allowed around local function definitions, since those could in theory be parsed either as statements or as expressions. I believe the ECMAScript grammar causes them to be parsed as statements, therefore parenthesization is not allowed, but this should be specifically stated.

[sunfishcode]

This was addressed in 7881fbe.