consistent style for <li> tags, removing </li> end tags
delete extraneous blank lines
whitespace
typo
punctuation
use third person in javadoc first sentence
whitespace
Update Creative Commons license URL in legal notices
coding style
coding style
whitespace
whitespace
typos
whitespace
typos
Update exchanger tests
Improve as performance test
Improved tests
Add exchanger performance tests; update others
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