Editorial: Fix %Generator% and %AsyncGenerator% <dfn>s

[ExE-Boss]

Currently, %AsyncGenerator% auto‑links to https://tc39.es/ecma262/#sec-asyncgeneratorfunction-prototype instead of https://tc39.es/ecma262/#sec-properties-of-asyncgeneratorfunction-prototype.

I also sorted the <ul> to match other definitions and made the “see Figure” text an <emu‑xref>.

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Preview (#sec-well-known-intrinsic-objects, #sec-properties-of-asyncgeneratorfunction-prototype)

[syg]

We're not consistent with whether we're saying "is the intrinsic object %Foo%" or "is %Foo%". My preference is we standardize on the latter.

Before I stamp this, I'd like to see what @ljharb @bakkot @michaelficarra think.

[ExE-Boss]

Well, all non‑dotted intrinsic <dfn>s all use “is the intrinsic object <dfn>%Foo%</dfn>”, and all (1) dotted intrinsic <dfn>s currently use “is <dfn>%Foo.bar%</dfn>”.

There’s also “This function is the <dfn>%FooProto_baz%</dfn> intrinsic object.”, but that’s used only in prose after <emu‑alg>.

[syg]

Well, all non‑dotted intrinsic s all use “is the intrinsic object %Foo%”, and all (1) dotted intrinsic s currently use “is %Foo.bar%”.

Ah I see, thanks for pointing this out. I retract my inconsistency statement. Still, I'm not sure the "intrinsic object %Foo%" is any clearer than "%Foo%". While it is true all %Foo% without dotted access are objects, is that property that salient?

[jmdyck]

We're not consistent with whether we're saying "is the intrinsic object %Foo%" or "is %Foo%". My preference is we standardize on the latter.

PR #1376 deleted "the intrinsic object" from pretty much every occurrence of "the intrinsic object %Foo%", other than the ones with <dfn>...</dfn> around "%Foo%". I think @ljharb gave a reason for excluding the latter cases, but I can't find it.

[ljharb]

At this point, regardless what I may have thought previously, I think "is %Foo%" or "is %Foo.bar%" is clearer. The very use of the % syntax implies "intrinsic", and as such, is redundant.

[ljharb]

The editors have decided to remove the redundant "the intrinsic object" phrasing, which I've included in this PR as a separate editorial commit, and rebased the PR's original commit on top of it.