Some of the benchmark code can be a little dense. Not *very* hard to
read but perhaps harder than it needs to be.
These changes (many of them whitespace-only) hopefully improve
readability.
There are also a few cases of `assert.equal()` that are changed to
`assert.strictEqual()`.
PR-URL: https://github.com/nodejs/node/pull/9790
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
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