fix: dir's auto definition

[marcoscaceres]

Closes #1079

This change (choose at least one, delete ones that don't apply):

• Breaks existing normative behavior (please add label "breaking")
• Adds new normative requirements
• Adds new normative recommendations or optional items
• Makes editorial changes (changes informative sections, or changes normative sections without changing behavior)
• Is a "chore" (metadata, formatting, fixing warnings, etc).

Implementation commitment (delete if not making normative changes):

• WebKit (https://bugs.webkit.org)
• Chromium (https://bugs.chromium.org/)
• Gecko (http://bugzilla.mozilla.org)

If change is normative, and it adds or changes a member:

• updated JSON schema

Commit message:

(Fill in. If making normative changes, describe exactly what the behavioral
difference will be.)

Person merging, please make sure that commits are squashed with one of the following as a commit message prefix:

• chore:
• editorial:
• BREAKING CHANGE:
• And use none if it's a normative change

---

Preview | Diff

[mgiuca]

I can review this when it's ready (are you still working on it)?

[marcoscaceres]

Thanks @mgiuca... then we should get @aphillips's eye's on it for approval.

[aphillips]

Looks good to me! Thanks.

[mgiuca]

I think we can fix up some other text in this section while we're here.

1. "implying that the value of the localizable members is by default:" -- I don't know how to parse this part of the sentence (it's right before the list of options). Delete it.

2. "the use agent SHOULD" - s/use/user/

3. Replace "When displaying the localizable members to an end-user..." with:

"The user agent SHOULD display the localizable members to the end-user using the [BIDI] algorithm. If the base direction is ltr or rtl, the user agent SHOULD override Rule P3 of [BIDI] ..."

(Remove the ordered list and drop list item 2 entirely - there is no need to explicitly state what happens in the "auto" case since it's covered by Bidi automatically. And we already have non-normative text to explain what happens in this case, above.)

(Also, it shouldn't say "apply Rule P1"; rule P2 is where the first strong character is chosen. But I would advise deleting this sentence entirely.)

[marcoscaceres]

@mgiuca, revised based on your feedback. Taking @dmurph review as the basis for merging.

We can do any additional fixes as a follow up.