Stop shadowing OpenJDK classes not originated by jsr166
use enhanced for loop
optimize toString methods
Update legal notices to Oracle wording
Reserve e for elements; use it for iterators
Sync with OpenJDK; remove all @version tags
Sync with OpenJDK; untabify
License update
copyright year update
6377302: AbstractCollection.toArray is not safe for concurrent collections
Location of Collections Guide has changed
whitespace
6382646: Core Library "frozen-in-time" SCCS keywords
copyright update for 2006
Merge conflicts
small fixups
whitespace
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