Translation guide update for "Default content"

Description

http://cldr.unicode.org/translation/translation-guide-general/default-content
Incorrect: Arabic [ar] content must be usable for Arabic (Egypt) [ar_EG].
Reason: the default content for "ar" is "ar_001", and "ar_EG" is a real regional locale that has at least some content that differs from "ar"

In addition, the entire topic has been edited for clarity.

https://docs.google.com/document/d/1KZpK7hn_35H0sBFio2ZyalmTpMRr_1Wa5gr5xA7yYyU/edit

xpath

None

locale

None

Priority

critical

Assignee

Kristi Lee

Reporter

Kristi Lee

Reviewer

Peter Edberg

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