Elliott Hughes 6c43e6b54d Fix and be more explicit about plurals best practices.
The "one" case should always include %d. Say so, and fix our examples.
Also make it clear that developers should always provide exactly "one"
and "other".

Bug: 18429565

(cherry picked from commit 1fe7d496db1ddc73289e6aae11f4dd4a970141d5)

Change-Id: I89656c74b7dfd91584e1bb6d0a3f2da1dda81079
2014-11-19 16:38:39 -08:00
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